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Bio 223 Musculoskeletal > Musculature And Innervation Of Upper Limb > Flashcards

Musculature And Innervation Of Upper Limb Flashcards

1
Q

Trapezius

A

Innervation: Accessory nerve

Action: Extension of the head, elevation and depression of scapula and glenoid

Positions the pectoral girdle (posterior)

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2
Q

Levator scapulae

A

Innervation: Dorsal scapular nerve

Action: Retracts scapula, depresses glenoid

Positions the pectoral girdle (posterior)

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3
Q

Rhomboideus major

A

Innervation: Dorsal Scapular nerve

Action: Retracts scapula, depresses glenoid

Positions the pectoral girdle (posterior)

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4
Q

Rhomboideus minor

A

Innervation: Dorsal Scapular nerve

Action: Retracts scapula, depresses glenoid

Positions pectoral girdle (posterior)

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5
Q

Serratus anterior

A

Innervation: Long thoracic nerve

Action: Rotates and protects scapula, elevates glenoid

Positions pectoral girdle (posterior)

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6
Q

Subclavius

A

Originates on the ribs

Inserts on clavicle

Positions the pectoral girdle (anterior)

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7
Q

Pectoralis minor

A

Innervation: Medial Pectoral nerve

Action: Stabilization of scapula

Positions the pectoral girdle (anterior)

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8
Q

Pectoralis major

A

Origin: Body of sternum, inferno-medial clavicle

Insertion: Greater tubercular crest of humerus

Innervation: Medial and lateral pectoral nerves

Moves the arm

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9
Q

Deltoid

A

Origin: Lateral half of clavicle, Scapular spine, acromion process

Insertion: Deltoid tuberosity of humerus

Innervation: Axillary nerve

Action: Abducts humerus (also flexes, extends, rotates and adducts)

Move the arm

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10
Q

Latissimus dorci

A

Origin: T7- T12, thoracolumbar fasciae

Insertion: Intertubercular groove of humerus (anterior)

Innervation: Thoracodorsal nerve

Action: Extension, adduction, and medial rotation of humerus

Move the arm

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11
Q

Groups of pectoral girdle musculature

- muscles of the shoulders and upper limbs

A

Groups

  • Muscles that position the pectoral girdle
  • Muscles that move the arm
  • Muscles that move the forearm and hand
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12
Q

Rotator cuff muscles

A

Muscles involved in shoulder rotation:

  • Supraspinatus
  • Subscapularis
  • Infraspinatus
  • Teres Minor

(SITS)
Muscles that move the arm

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13
Q

Subscapularis

A

Origin: Deep surface of scapula

Insertion: Lesser tubercle of humerus

Innervation: Upper and Lower Subscapular nerves

Action: Medially rotates humerus

Muscles that move the arm

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14
Q

Teres minor

A

Origin: Lower edge of scapula

Insertion: Greater tubercle of humerus

Innervation: Axillary nerve

Action: Laterally Rotates humerus

Muscles that move the arm

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15
Q

Supraspinatus

A

Origin: Supraspinous fossa of scapula

Insertion: Greater tubercle of humerus

Innervation: Suprascapular nerve

Action: Abducts humerus

Muscles that move the arm

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16
Q

Infraspinatus

A

Origin: Infraspinous fossa of scapula

Insertion: Greater tubercle of humerus

Innervation: Suprascapular

Action: Laterally rotates humerus

Muscles that move the arm

17
Q

Coracobrachialis

A

Makes up part of the mass of the proximal arm but doesn’t actually cross the elbow joint (scapula to humerus only)

18
Q

Coracobrachialis

A

Origin: Coracoid process

Insertion: Medial shaft of humerus

Innervation: Flexion and adduction of humerus

Action: Musculocutaneous nerve

Muscles that move the arm

19
Q

Teres major

A

Origin: Inferior edge of scapula

Insertion: Lesser tubercular crest

Innervation: Lower Subscapular

Action: Extends, adducts and medially rotates humerus

Muscles that move the arm

20
Q

Muscles that may originate from the scapula or brachium (humerus) that move the elbow cross _____ and ____ on the bones of the forearm

A

The joint, insert

21
Q

Elbow extensors

A

Origin:

  • Long head: Infraglenoid tubercle
  • Medial &Lateral heads: Posterior surface of humeral shaft

Insertion: Olecranon process of ulna

Innervation: radial nerve

Action: Extends elbow

22
Q

Biceps Brachii

A

Origin:

  • Short head: Coracoid process
  • Long head: Supragleniod tubercle

Insertion: Radial tuberosity on proximal radius

Innervation: Musculocutaneous nerve

Action: flexes elbow, supinates

Elbow Flexors

23
Q

Brachialis

A

Origin: Anterior distal humerus

Insertion: Tuberosity of ulna

Innervation: Musculocutaneous nerve and radial nerve

Action: flexes elbow

Elbow Flexors

24
Q

Brachioradialis

A

Origin: superior to later epicondylitis of humerus

Insertion: Lateral styled of radius

Innervation: Musculocutaneous nerve and radial nerve

Action: flexes elbow

Elbow Flexors

25
Q

Palmaris longus

A

Origin: Medial epicondyle of humerus

Insertion: Palmar aponeurosis

Innervation: Median nerve

Action: flexes wrist

(Superficial layer)

Wrist Flexors

26
Q

Flexor digitorum superficialis

A

Origin: Medial epicondyle of humerus

Insertion: Middle phalanges of fingers 2-5

Innervation: Median nerve

Action: Flexes wristband middle phalanges

(Intermediate layer)

Wrist Flexors

27
Q

Flexor digitorum profundus

A

Origin: Anteromedial surface of ulna

Insertion: Distal phalanges of fingers 2-5

Innervation: Median nerve

Action: Flexes distal phalanges

(Deep layer)

Wrist Flexors

28
Q

Extensor digitorum

A

Origin: Lateral epicondyle of humerus

Insertion: Distal phalanges of fingers 2-4

Innervation: Radial nerve

Action: Extends fingers and wrist; abducts fingers

(Superficial layer)

Wrist Extensors

29
Q

Abductor pollicis longus

A

Origin: Posterior surface of radius and ulna

Insertion: Base of 1st metacarpal

Innervation: Radial nerve

Action: Abducts and extends thumb

(Deep layer)

Wrist Extensors

30
Q

Supinator muscle

A

Origin: Lateral epicondyle of humerus

Insertion: Proximal end of radius

Innervation: Radial nerve

Action: Supinates forearm

31
Q

Biceps brachii

A

Origin:

  • Short head: Coracoid process
  • Long head: Glenoid fossa

Insertion: Proximal radius

Innervation: Musculocutaneous nerve

Action: Flexes elbow, supinates

32
Q

Pronation teres

A

Origin: Medial condyle humerus

Insertion: Lateral radius (midshaft)

Innervation: Median nerve

Action: Pronates forearm

Bio 223 Musculoskeletal (3 decks)

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