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MSK Anatomy > Upper Limb > Flashcards

Upper Limb Flashcards

1
Q

Muscles forming the ANTERIOR WALL of the AXILLA

A

PECTORALS MAJOR & PECTORALIS MINOR

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2
Q

Muscles forming the POSTERIOR WALL of the AXILLA

A

SCAPULA, SUBSCAPULARIS, TERES MAJOR & LATISSIMUS DORSI

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3
Q

Muscles forming the MEDIAL WALL of the AXILLA

A

THORACIC WALL & SERRATUS ANTERIOR

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4
Q

Muscles forming the LATERAL WALL of the AXILLA

A

INTERTUBERCULAR SULCUS OF HUMERUS

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5
Q

Contents of the axilla

A

Axillary artery, Axillary vein, Brachial plexus, Tendons of Biceps Brachii + Coracobrachialis & Axillary lymph nodes

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6
Q

Brachial plexus values

A

Formed by the ANTERIOR (ventral) RAMI of C5-T1

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7
Q

What root(s) of the brachial plexus give the superior trunk?

A

C5 + C6 roots

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8
Q

What root(s) of the brachial plexus give the middle trunk?

A

C7 root

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9
Q

What root(s) of the brachial plexus give the inferior trunk?

A

C8 + T1 roots

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10
Q

Which nerve root(s) are affected in Erb’s palsy?

A

C5 + C6 roots

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11
Q

What is Erb’s palsy?

A

Injury to UPPER trunk giving a MEDIALLY ROTATED UPPER TRUNK WITH FLEXED WRIST

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12
Q

What causes Erb’s palsy?

A

HYPEREXTENSION of the HEAD from the SHOULDER

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13
Q

Which muscles are affected in Erb’s palsy?

A

SUPRASPINATUS, INFRASPINATUS, SUBCLAVIAS, BICEPS BRACHII, BRACHIALIS, CORACOBRACHIALIS, DELTOID & TERES MINOR

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14
Q

What is Klumpke’s palsy?

A

Injury to LOWER trunk giving a loss of grasp reflex with a supinated hand, extended wrist and fingers clawed

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15
Q

Which nerve root(s) are affected in Klumpke’s palsy?

A

C8 + T1 roots

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16
Q

What causes Klumpke’s palsy?

A

Undue ABDUCTION of the ARM

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17
Q

Which muscles are affected in Klumpke’s palsy?

A

INTRINSIC MUSCLES OF THE HAND + ULNAR FLEXORS OF WRIST & FINGERS AFFECTED

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18
Q

What are the cords of the brachial plexus?

A

Lateral, posterior and medial **

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19
Q

What are the branches of the LATERAL CORD?

A

MUSCULOCUTANEOUS nerve (+ lateral pectoral and lateral root of median nerves)

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20
Q

What are the branches of POSTERIOR CORD?

A

AXILLARY & RADIAL nerves (+ thorascodorsal, upper subscapular and lower sub scapular nerves)

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21
Q

What are the branches of MEDIAL CORD?

A

ULNAR nerve (+medial pectoral, median root of median nerve, medial cutaneous nerves of arm and forearm)

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22
Q

Arterial supply of the Upper Limb

A

Brachiocephalic–>Subclavian–>Axillary–>Brachial–>Radial/Ulnar–>Deep palmar arch–> Superficial palmar arch

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23
Q

Name the superficial veins of the Upper Limb

A

Cephalic vein, Median cubital vein & Basilic veins

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24
Q

Which of the veins of the upper limb is most lateral?

A

Cephalic vein

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25
Q

Which of the veins of the upper limb is most medial?

A

Basilic vein

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26
Q

Which of the veins of the upper limb shunts blood from one of the other veins to another? From which to which?

A

Median Cubital vein shunts blood from Cephalic to Basilic

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27
Q

Area supplied by C3 dermatome

A

Tip of shoulder

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28
Q

Area supplied by C4 dermatome

A

Top half of shoulder

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29
Q

Area supplied by C5 dermatome

A

Lateral aspect of arm

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30
Q

Area supplied by C6 dermatome

A

Lateral aspect of forearm and thumb

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31
Q

Area supplied by C7 dermatome

A

Middle 3 fingers

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32
Q

Area supplied by C8 dermatome

A

Little finger

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33
Q

Area supplied by T1 dermatome

A

Medial aspect of elbow

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34
Q

Area supplied by T2 dermatome

A

Medial aspect of arm

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35
Q

What are the 5 groups of AXILLARY LYMPH NODES?

A

Anterior (pectoral), Posterior (subscapular), Apical, Central and Lateral groups

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36
Q

Pectoral girdle

A

Set of bones connecting the upper limb to the axial skeleton

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37
Q

Sterno-clavicular joint

A

Small, double plane synovial joint articulating entire upper limb and pectoral girdle

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38
Q

Acromio-clavicular joint

A

Plane synovial joint connecting acrimion of scapula and lacrimal end of clavicle

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39
Q

What causes movement of pectoral girdle?

A

Sterno-clavicular, acromio-clavicular and shoulder joints all moving simultaneously

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40
Q

Scapulohumeral rhythm

A

When considering abduction of arm from anatomical position- initially all movement at glenohumeral joint BUT beyond first 30 degrees, for every 3 degrees of abduction, 2 degrees is occurring at the shoulder joint and 1 degree is occurring at scapulothoracic joint (2:1 ratio)

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41
Q

Muscles ELEVATING scapula

A

LEVATOR SCAPULAE & UPPER TRAPEZIUS FIBRES

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42
Q

Muscles DEPRESSING scapula

A

PECTORALIS MINOR, LOWER TRAPEZIUS FIBRES, LATISSMUS DORSI & SUBCLAVUS

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43
Q

Muscles PROTRACTING scapula

A

SERRATUS ANTERIOR

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44
Q

Muscles RETRACTING scapula

A

MIDDLE TRAPEZIUS FIBRES & RHOMBOIDS

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45
Q

Muscles UPWARDLY ROTATING scapula

A

UPPER & MIDDLE TRAPEZIUS FIBRES

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46
Q

Muscles DOWNWARDLY ROTATING scapula

A

INFERIOR TRAPEZIUS, INFERIOR SERRATUS ANTERIOR & RHOMBOIDS

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47
Q

What type of joint is the shoulder?

A

Synovial ball and socket joint

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48
Q

What makes up the ball of the shoulder joint?

A

Head of humerus

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49
Q

What makes up the socket of the shoulder joint?

A

Glenoid cavity

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50
Q

What surrounds the socket of the shoulder joint? What’s it role?

A

Glenoid labrum (fibrocartilaginous cartilage) which deepens articular cavity and protects edges of the bones

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51
Q

Name the ligaments of the shoulder joint

A

CORACOHUMERAL LIGAMENT, CORACOACROMIAL ARCH & GLENOHUMERAL LIGAMENT

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52
Q

What is the role of the Coracohumeral Ligament?

A

Strengthens superior aspect of joint

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53
Q

What is the role of the Coracoacromial Arch?

A

Prevents upward displacement of the humeral head

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54
Q

What is the role of the Glenohumeral Ligament?

A

Strengthens anterior aspect of joint

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55
Q

What is the role of BURSAE around the shoulder joint?

A

Provide cushioning around joints, via fluid filled centre

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56
Q

What is a Bursae?

A

Small fluid-filled sac lined by synovial membrane with an inner capillary layer of viscous fluid

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57
Q

Name the bursa around the shoulder joint?

A

Subacromial bursa & Subscapular bursa

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58
Q

What is the role of the Rotator Cuff muscles?

A

Allow shoulder movement and gives support, preventing dislocation

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59
Q

What are the Rotator Cuff muscles?

A

SUBSCAPULARIS, SUPRASPINATUS, INFRASPINATUS & TERES MINOR

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60
Q

What movements do the Rotator Cuff muscles carry out on Glenohumeral joint?

A

FLEXION, EXTENSION, ADDUCTION, ABDUCTION, MEDIAL/LATERAL ROTATION & CIRCUMDUCTION

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61
Q

What are the other muscles of the Shoulder joint?

A

DELTOID, PECTORALIS MAJOR, PECTORALIS MINOR, SERRATUS ANTERIOR, TRAPEZIUS, TERES MAJOR & LATISSIMUS DORSI

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62
Q

What are the action(s) of the ANTERIOR FIBRES of DELTOID?

A

FLEX & MEDIALLY ROTATE SHOULDER

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63
Q

What are the action(s) of the MIDDLE FIBRES of DELTOID?

A

ABDUCT SHOULDER

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64
Q

What are the action(s) of the POSTERIOR FIBRES of DELTOID?

A

EXTEND & LATERALLY ROTATE SHOULDER

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65
Q

Which nerve innervates the Deltoid muscle?

A

AXILLARY NERVE (C5 + C6)

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66
Q

What are the action(s) of the PECTORALS MAJOR?

A

ADDUCTS & MEDIALLY ROTATES HUMERUS

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67
Q

Which nerve(s) innervates the Pectoralis Major muscle?

A

LATERAL & MEDIAL PECTORAL NERVES

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68
Q

What are the action(s) of the SERRATUS ANTERIOR?

A

PROTRACTS SCAPULAE

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69
Q

Which nerve innervates the SERRATUS ANTERIOR?

A

LONG THORACIC NERVE (C5, C6 + C7)

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70
Q

What are the action(s) of the SUPERIOR FIBRES of TRAPEZIUS?

A

ELEVATES SCAPULA

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71
Q

What are the action(s) of the MIDDLE FIBRES of TRAPEZIUS?

A

RETRACTS SCAPULA

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72
Q

What are the action(s) of the INFERIOR FIBRES of TRAPEZIUS?

A

DEPRESS SCAPULA

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73
Q

Which nerve innervates the TRAPEZIUS?

A

ACCESSORY NERVE (CN XI)

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74
Q

What are the action(s) of TERES MAJOR?

A

DEPRESS SHOULDER + ADDUCTS & MEDIALLY ROTATES HUMERUS

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75
Q

What are are the action(s) of LATISSIMUS DORSI?

A

INTERNAL ROTATION OF SHOULDER + EXTENSION

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76
Q

What are the compartments of the arm?

A

ANTERIOR (flexor) + POSTERIOR (extensor)

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77
Q

How many muscles are in the anterior compartment of the arm? What are they?

A

3- BICEPS BRACHII, CORACOBRACHIALIS & BRACHIALIS

78
Q

Which is the most superficial muscle of the arm?

A

Biceps Brachii

79
Q

Which is the middle muscle of the arm?

A

Coracobrachialis

80
Q

Which is the deepest muscle of the arm?

A

Brachialis

81
Q

Biceps Brachii

A

Arises from scapula to form 2 heads LONG (lateral) AND SHORT (medial) heads which unite at distal 1/3 of upper arm to form a tendon

82
Q

Where does the long head of the Biceps Brachii arise from?

A

Supra-glenoid tubercle

83
Q

Where does the short head of the Biceps Brachii arise from?

A

Coracoid process

84
Q

Which head of the Biceps Brachii is most lateral? And which most medial?

A

Lateral - long head & medial - short head

85
Q

What is the action of the BICEPS BRACHII?

A

FLEXION (at shoulder and elbow joint) & SUPINATION (at radio-ulnar joint)

86
Q

Which nerve innervates Biceps Brachii?

A

MUSCULOCUTANEOUS NERVE (C5 &C6)

87
Q

Coracobrachialis

A

Arises from tip of coracoid process and inserts into medial margin of humerus

88
Q

What is the action of the CORACOBRACHIALIS?

A

FLEXION + ABDUCTION of arm (& resists dislocation of shoulder)

89
Q

Which nerve innervates Coracobrachialis?

A

MUSCULOCUTANEOUS NERVE (C5, C6, C7)

90
Q

Brachialis

A

Arises from front of distal half of shaft of humerus and inserts into coronoid process of ulna

91
Q

What is the action of the BRACHIALIS?

A

FLEXION of elbow joint

92
Q

Which nerve innervates Coracobrachialis?

A

MUSCULOCUTANEOUS NERVE (C5, C6)

93
Q

Which cord of the brachial plexus does the MUSCULOCUTANEOUS NERVE arise from?

A

Lateral cord

94
Q

Which compartment of the arm does the Musculocutaneous nerve innervate?

A

Anterior compartment (BBC muscles)

95
Q

What is the path of the Muculocutaneous nerve?

A

Enters arm through coerce-brachialis and descend between biceps brachii and brachialis

96
Q

Once it supplies the muscles of the arm, what does the Musculocutaneous nerve continue on to be?

A

Lateral Cutaneous of the forearm

97
Q

What are the root value of the Musculocutaneous nerve?

A

C5, C6, C7

98
Q

Root of the Brachial Artery

A

Direct continuation of Axillary artery; begins at lower border of the Teres Major muscles and ends in the cubital fossa

99
Q

What is the name of the deep artery of the arm branching from brachial artery?

A

Profunda Brachii Artery

100
Q

Root of the Median Nerve

A

Descends along lateral side of axillary artery and upper part of brachial artery, crossing to the medial side of the brachial artery and entering the cubital fossa

101
Q

What muscles in the arm does the Median Nerve supply?

A

NONE

102
Q

Which cord of the brachial plexus does the MEDIAN NERVE arise from?

A

Medial and Lateral cords

103
Q

Which cord of the brachial plexus does the ULNAR NERVE arise from?

A

Medial cord

104
Q

What muscles in the arm does the Ulnar Nerve supply?

A

NONE

105
Q

When hitting the ‘funny bone’, which nerve is impacted?

A

Ulnar Nerve

106
Q

Root of the Ulnar Nerve

A

Descends along medial side of brachial artery entering the posterior compartment and running along the medial head of the triceps and to the BACK OF THE MEDIAL EPICONDYLE

107
Q

Which nerve could be damaged with an injury at the Radial Groove?

A

Radial Nerve

108
Q

Which nerve could be damaged with an injury at the Medial Epicondyle?

A

Ulnar Nerve

109
Q

Which nerve could be damaged with an injury at the Surgical Neck of the humerus?

A

Axillary Nerve

110
Q

What is the cubital fossa?

A

Triangular depression/hollow in front of the elbow

111
Q

Which artery can be palpated medial to the tendon of the Biceps Brachii in cubital fossa?

A

Brachial Artery

112
Q

What makes up the base of the cubital fossa boundary?

A

Imaginary line between 2 epicondlyes

113
Q

What makes up the medial border of the cubital fossa boundary?

A

Brachioradialis muscle

114
Q

What makes up the lateral border of the cubital fossa boundary?

A

Pronator teres muscle

115
Q

What does the cubital fossa contain?

A

BRACHIAL, RADIAL & ULNAR ARTERIES, DEEP ACCOMPANYING VEINS, BICEPS BRACHII TENDON, MEDIAN & RADIAL NERVE

116
Q

What is the median cubital vein often used for?

A

IV injection

117
Q

Which artery is used to auscultate when measuring blood pressure?

A

Brachial artery

118
Q

How many muscles are in the posterior compartment of the arm? What are they?

A

1- TRICEPS BRACHII

119
Q

Why is biceps called biceps?

A

2 heads

120
Q

Why is triceps called triceps?

A

3 heads

121
Q

Triceps Brachii

A

Arises from long head from the scapula & by shorter heads (medial and lateral) from the humerus, continuing to common tendon of triceps which is inserted into Olecranon process of ulna

122
Q

What is the action of the TRICEPS BRACHII?

A

EXTENSION of elbow

123
Q

Anconeus muscles

A

Helps the triceps extend the forearm + abducts the ulna during pronation of the forearm

124
Q

Which nerve innervates Triceps Brachii?

A

RADIAL NERVE (C7, C8, T1)

125
Q

Which cord of the brachial plexus does the RADIAL NERVE arise from?

A

Posterior cord

126
Q

Radial Nerve

A

Nerve of the extensor compartment of arm and forearm (innervates all the extensor muscles of elbow and wrist joint)

127
Q

Root of Radial Nerve

A

Enters the arm anterior to the long head of triceps, runs along profunda artery and curves around mid shaft region of humerus in the radial groove

128
Q

What are the root values of the radial nerve?

A

C5, C6, C7, C8, T1

129
Q

What would cause a radial nerve injury and what is it most likely to affect and cause?

A

Radial groove injury by fracture of the humerus is most likely to affect Triceps Brachii and Biceps Brachii and cause a wrist drop

130
Q

What type of joint is the elbow joint?

A

Synovial hinge joint

131
Q

What are the 2 articulations of the elbow joint?

A

Trochlear notch of ulna and humerus & head of radius and capitulum of humerus

132
Q

What actions occur at the elbow joint?

A

Flexion and extension

133
Q

What muscles perform FLEXION at the elbow joint?

A

Brachialis, Biceps Brachii and Brachioradialis

134
Q

What muscles perform EXTENSION at the elbow joint?

A

Triceps Brachii and Anconeus

135
Q

Name the ligaments of the elbow

A

Ulnar Collateral, Radial Collateral and Anular Ligaments

136
Q

How many radio-ulnar joints are there?

A

2 (proximal and distal)

137
Q

What type of joints are the radio ulnar joints?

A

Pivot type synovial type joints

138
Q

What actions do the RADIO-ULNAR JOINTS carry out?

A

SUPINATION AND PRONATION

139
Q

Which muscles are involved in SUPINATION of arm/forearm?

A

Supinator and Biceps Brachii

140
Q

Which muscles are involved in PRONATION of arm/forearm?

A

Pronator teres and Pronator Quadratus

141
Q

How many layers are there to the Anterior Forearm? What are they?

A

3- Superficial, Deep & Intermediate

142
Q

What action do the muscles in the Anterior Forearm perform?

A

FLEXORS of the wrist/digits & PRONATORS of the forearm

143
Q

How many muscles are in the Superficial Group of the Anterior Forearm? What are they?

A

4- PRONATOR TERES, FLEXOR CARPI RADIALIS, PALMARIS LONGUS & FLEXOR CARPI ULNARIS

144
Q

PRONATOR TERES ~ action and innervation

A

PRONATES & FLEXES FOREARM AT ELBOW and INNERVATED BY MEDIAN NERVE

145
Q

FLEXOR CARPI RADIALIS ~ action and innervation

A

FLEXES & ABDUCTS HAND AT WRIST and INNERVATED BY MEDIAN NERVE

146
Q

PALMARIS LONGUS ~ action and innervation

A

FLEXES HAND AT WRIST and INNERVATED BY MEDIAN NERVE

147
Q

FLEXOR CARPI ULNARIS ~ action and innervation

A

FLEXES & ADDUCTS HAND AT WRIST and INNERVATED BY ULNAR NERVE

148
Q

What are the superficial muscles of the anterior forearm attached to?

A

Attached by a common flexor tendon to the medial epicondyle of the humerus

149
Q

BRACHIORADIALIS ~ action, innervation and exception

A

FLEXES FOREARM AT THE ELBOW JOINT and INNERVATED BY RADIAL NERVE (Belongs to the extensor compartment but functionally is a flexor of the forearm)

150
Q

How many muscles are in the Intermediate Group of the Anterior Forearm? What are they?

A

1- FLEXOR DIGITORUM SUPERFICIALIS

151
Q

FLEXOR DIGITORUM SUPERFICIALIS ~ action and innervation

A

FLEXES WRIST, METACARPO-PHALANGEAL + INTERPHALANGEAL JOINTS) and INNERVATED BY MEDIAN NERVE (Gives rise to 4 tendons which attach to the medial four digits)

152
Q

How many muscles are in the Deep Group of the Anterior Forearm? What are they?

A

3- FLEXOR DIGITORUM PROFUNDUS, FLEXOR POLLICUS LONGUS & PRONATOR QUADRATUS

153
Q

FLEXOR DIGITORUM PROFUNDUS ~ action and innervation

A

FLEXES WRIST & FINGER JOINTS with dual nerve supply –> MEDIAL PART (digits 4 + 5) supplied by ULNAR NERVE and LATERAL PART (digits 2 + 3) supplied by MEDIAN NERVE

154
Q

FLEXOR POLLICIS LONGUS ~ action and innervation

A

LONG FLEOX OF THUMN and INNERVATED BY MEDIAN NERVE

155
Q

PRONATOR QUADRATUS ~ action and innervation

A

PRONATES FOREARM and INNERVATED BY MEDIAN NERVE

156
Q

What is the main nerve of the anterior compartment of the forearm?

A

MEDIAN NERVE

157
Q

Which muscles does the Median Nerve not supply in the forearm?

A

FLEXOR CARPI ULNARIS & Medial Half of FLEXOR DIGITORUM PROFUNDUS

158
Q

What is the Median Nerve medial to?

A

Brachial Artery

159
Q

Which nerve supplies the muscles that the Median Nerve doesn’t supply in the forearm (FLEXOR CARPI ULNARIS & Medial Half of FLEXOR DIGITORUM PROFUNDUS)?

A

Ulnar Nerve

160
Q

How many terminal branches does the Brachial Artery have? What are they?

A

2- ULNAR & RADIAL ARTERIES

161
Q

Where is the Carpal Tunnel?

A

Deep to the flexor retunaculum between the scaphoid and the trapezium on the lateral side + pisiform and hamate bone on the medial side

162
Q

What is the Fibrous Retinaculum?

A

Strong fibrous band which converts the concavity of the palmar surface of the carpal bones and converts it into the carpal tunnel

163
Q

What does the Carpal Tunnel contain?

A

MEDIAN NERVE, 4 TENDONS OF FDP, 4 TENDONS OF FDS & 1 TENDON OF FPL

164
Q

Which nerve is affected in Carpal Tunnel Syndrome?

A

Median Nerve

165
Q

How is Carpal Tunnel Syndrome treated?

A

By cutting the Flexor Retinaculum

166
Q

How many compartments do the Intrinsic Muscles of the Hand have? What are they?

A

5; THENAR, HYPOTHENAR, ADDUCTOR, CENTRAL COMPARTMENT & INTEROSSEI

167
Q

THENAR COMPARTMENT (muscles, action and innervation)- lateral part of hand

A

ABDUCTOR POLLICIS BREVIS, FLEXOR POLLICIS BREVIS AND OPPONENS POLLICIS
APPOSITION OF THE THUMB
INNERVATED BY MEDIAN NERVE

168
Q

HYPOTHENAR COMPARTMENT (muscles, action and innervation)- medial part of hand

A

ABDUCTOR DIGITI MINIMI, FLEXOR DIGITI MINIMI AND OPPONENS DIGITI MINIMI
ABDUCT, FLEX AND OPPOSE
INNERVATED BY ULNAR NERVE

169
Q

ADDUCTOR COMPARTMENT (muscles, action and innervation)

A

ADDUCTOR POLLICIS (oblique and transverse heads)
ADDUCTION OF THUMB
INNERVATED BY ULNAR NERVE

170
Q

CENTRAL COMPARTMENT (muscles, action and innervation)

A

4 earth worm like muscles called LUMBRICALS which originate from FLEXOR DIGITORUM PROFUNDUS
FLEX fingers at MCP joint AND SIMULTANEOUSLY EXTEND ICP joint of 2-5 digits
Medial 2 innervated by ULNAR NERVE
Lateral 2 innervated by MEDIAN NERVE

171
Q

INTEROSSEI COMPARTMENT (muscles, action and innervation)

A

Muscles between metacarpal bones

4 DORSAL INTEROSSEI ABDUCT THE FINGERS (DAB)
3 PALMAR INTEROSSEI ADDUCT THE FINGERS (PAD)

INNERVATE BY ULNAR NERVE

172
Q

What type of joint is the Wrist Joint?

A

Synovial condylar joint - also known as radiocarpal joint

173
Q

What forms the distal and proximal ends of this joint?

A

Distal end of radius from the proximal part of the joint

Proximal row of carpal bones from the distal articular part of the joint

174
Q

Name the carpal bones

A

Schaphoid, Lunate, Triquetrum, Pisiform, Hamat, Capitate, Trapezios, Trapezium

175
Q

What are the actions of the wrist joint?

A

Flex, Extend, Circumduct, Adduct and Abduct

176
Q

How many groups of muscles are there to the Posterior Forearm? What are they?

A

3 functional groups;

  1. Muscles that extend and abduct/adduct the hand
  2. Muscles that extend the medial 4 digits
  3. Muscles that extend or abduct the thumb
177
Q

What action do the muscles in the Posterior Forearm perform?

A

EXTENSORS of the wrist/digits, ABDUCT/ADDUCTORS of the wrist + SUPINATORS of the thumb

178
Q

Which muscles are in group 1 (muscles that extend and abduct/adduct the hand)?

A

EXTENSOR CARPI RADIALIS LONGUS
EXTENSOR CARPI RADIALIS BREVIS
EXTENSOR CARPI ULNARIS

179
Q

Which muscles are in group 2 (muscles that extend the medial 4 digits)?

A

EXTENSOR DIGITORUM
EXTENSOR INDICUS
EXTENSOR DIGITI MINIMI

180
Q

Which muscles are in group 3 (muscles that extend or abduct the thumb)?

A

ABDUCTOR POLLICIS LONGUS
EXTENSOR POLLICIS BREVIS
EXTENSOR POLLICIS LONGUS

181
Q

Which nerve innervates all the muscles in the posterior compartment of the forearm?

A

Radial nerve

182
Q

Supinator (action and innervation)

A 
Supinates forearm (rotates radius)
Supplied by Deep Branch of Radial Nerve
183
Q

What is the main superficial vein of the hand?

A

Dorsal venous arch

184
Q

Where does the Radial Nerve divide? Into what?

A

Cubital fossa it divides into superficial and deep branches (deep branch/posterior interosseous nerve)

185
Q

What are the Deep Muscles of the Forearm? What part of the arm do they act on?

A

Group 3

ABDUCTOR POLLICIS LONGUS
EXTENSOR POLLICIS BREVIS
EXTENSOR POLLICIS LONGUS

All acting on the thumb

186
Q

Which tendon(s) bind the anatomical snuff box laterally?

A

Tendon of APL + EPB

187
Q

Which tendon(s) bind the anatomical snuff box medially?

A

Tendon of EPL

188
Q

Which 2 carpal bones can be felt in the snuff box?

A

Scaphoid + Trapezium

189
Q

Which artery can be palpated in anatomical snuff box?

A

Radial artery

190
Q

Fracture of which bone can be fatal for the anatomical snuff box artery?

A

Scaphoid bone

MSK Anatomy (2 decks)

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