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Test 1 Flashcards

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1
Q

What TWO muscles are innervated by the radial nerve?

A
  1. Triceps Brachii
  2. Anconeus
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2
Q

What THREE muscles are innervated by the musculotaneous nerve?

A
  1. coracobrachialis
  2. biceps brachii
  3. brachialis
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3
Q

CORACOBRACHIALIS

A

origin: coracoid process

insertion: medial side of the shaft of the humerus

functions:

  • aid in flexion of arm and shoulder joint
  • aid in adduction of arm and shoulder joint

innervation: musculocutaneous nerve

ex: mopping the floor

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4
Q

BICEPS BRACHII

A

ORIGIN:

  • short head from the coracoid process
  • arises in conjuction with coracobrachialis
  • long head from the supreglenoid tubercle
  • tendon crosses the humeral head, within the joint of capsule of the glenohumeral joint and descends in the intertubercular groove
  • held in place by the transverse humeral ligament

INSERTION:tuberosity of the radiusandantebrachial fascia [via the bicipital aponeruosis-medial]

INNERVATION: musculocutaneous nerve

FUNCTION:

  • elbox flexion (esp against resistance)
  • most effective when flexion is combined with supination
  • powerful forearm supinator
  • Long head of biceps brachii:
  • can assist in shoulder flexion
  • can assist in resisting downward displacement of the humerus [in loaded position]
    ex: picking up object, bringing food to mouth
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5
Q

BRACHIALIS

A

ORIGIN:

  • anterior surface of the distal half of the humerus
  • intermuscular septa

INSERTION: tuberosity of the ulna

INNERVATION: musculocutaneous nerve

FUNCTION:

  • flexion in the forearm
  • always active in elbow flexion regardless of forearm postion

Ex: bringing food to the mouth

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6
Q

TRICEPS BRACHII

-deep to antebrachial fascia

A

ORIGIN:

  • Long
  • infraglenoid tubercle
  • Lateral
  • above the infraglenoid tubercle
  • Medial
  • below the radial groove on the posterior shaft of the humerus

INSERTION: side of the olcranon tendon as a common tendon

INNERVATION: radial nerve

FUNCTION:

  • elbow extension
  • Long Head:
  • shoulder extension
  • shoulder adduction
  • Medial Head:
  • elbow extension
  • Long and Lateral Head:
  • recrutied for extra power when extending against force
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7
Q

ANCONEUS

-deep to antebrachial fascia

A

ORIGIN: lateral epicondyle of the humerus

INSERTION: side of the olecranon and upper part of the ulna

INNERVATION: radial nerve

FUNCTION:

  • assists in elbow extension- weak
    ex: giving blood
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8
Q

What is the bone in the arm?

A

The humerus

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9
Q

What artery supplies the arm?

A

the brachial artery and its branches

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10
Q

The brachial artery is an a continuation of what artery?

A

the axillary artery

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11
Q

A branch of the brachial artery that supplies the the posterior arm is the _______ _________ _______, also know as the ______ ______ ______.

A

profunda brachii artery ; deep brachial artery

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12
Q

How many muscles are in the anterior region of the arm?

A

THREE

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13
Q

How many muscles are in the posterior region of the arm?

A

TWO

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14
Q

What is the largest bone in the upper extremity?

A

The humerus

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15
Q

This is a nodule or small eminence.

It is an elevation of bone for attachement of muscles;

It can be non-bone.

Ex: small elevation of skin.

A

Tubercle

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16
Q

This is a large elevation or large tubercle or protuberence.

Especially of bone.

Tends to be roughened areas of bone where muscles attach.

Also known as an atlas.

A

Tuberosity

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17
Q

This is the site of where the junction of the head and tubercles.

A

Anatomical neck

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18
Q

This is the site where intra-articular fractures occur.

A

anatomical neck

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19
Q

This place on the humerus is inferior to the head and tubercles.

A

surgical neck

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20
Q

What is a site on the humerus where frequent extra-articular fractures occur?

A

Surgical Neck

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21
Q

What nerve is located close to the surgical neck region of the humers and therefore vulnerable to damage due to breaks in the region?

A

Axillary

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22
Q

The spiral or radial groove is located on the ______ aspect of the humerus shaft.

A

posterior

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23
Q

What nerve is vulnerable to mid-shaft fractures?

24
Q

What nerve is locate on the posterior aspect of the of the meidal epiocondyle of the humerus?

25
What bone does the trochlea articulate with?
Ulna
26
What are the 2 fossa associate with the trochlea?
1. coronoid fossa 2. olecranon fossa
27
Is the olecranon fossa of the trochlea on the humerus posterior or anterior?
posterior
28
What part of the humerus articulate with the radius?
Capitulum
29
Which vein ascends the arm in the median bicipital groove?
Basilic vein
30
Which vein ascends the arm in the lateral biciptal groove to the deltopectoral groove?
Cephalic vein
31
What vein empites into the axillary vein by piercing the deep fascia at the clavipecoral [or deltopectoral] triangle?
Cephalic vein
32
What vein is continuous with the axillary vein?
the basilic vein
33
The deep fascia of the arm is also known as what type of fascia?
brachial fascia
34
The brachial fascia is continuous with what type of fascia in the forearm?
antebrachial fascia
35
The medial and lateral ________ \_\_\_\_\_\_\_\_ divide the arm into posterior and anterior compartments or regions.
intermuscular septa
36
The muscles of the anterior or flexor compartment include which muscles?
1. coracobrachialis 2. biceps brachii 3. brachialis
37
The posterior or extensor compartment inlcudes which muslces?
1. triceps brachii 2. anconeus
38
The muscles of the anterior or flexor compartment are predominantly elbow \_\_\_\_\_\_.
flexors
39
The muslces of the posterior compartment of the arm primarily fucntion as elbow \_\_\_\_\_\_.
extensors
40
What nerve pierces the coracobrahcialis muscle?
the musculocutaneous nerve.
41
Which nerve lies medial to the brachial artery in the distal arm?
the median artery
42
True or False: Do median and ulnar nerves supply muscles in the arm?
FALSE
43
What nerve passes through the triangular interval?
Radial nerve
44
T or F: The joints of the shoulder complex often work alone.
FALSE
45
How many moving structures are located in the shoulder region?
Six: - 3 true structure - 3 functional
46
Name the 3 structural joints:
1. scapulothoracis joint 2. suprahumeral 3. intertubercular groove
47
T or F: The scapulothoracic joint is a true anatomical joint.
FALSE
48
What movements does the pectoral girdle permit?
1. elevation 2. depression 3. retraction 4. protraction 5. upward rotation 6. downward rotation
49
What is the name for the coordinated series of moevements between the humerus and the scapula that allow for flexion and abduction?
scapuohumeral rhythm
50
51
Approx how many degrees does the scapulohumeral rhythm allow?
~ 180
52
of the 180 degrees provided by the scapulohumeral rhythm, scapular rotation provides how many of these degrees to shoulder movement?
60 degrees
53
What is significant about the scuplohumeral rhythm?
The glenohumeral and scapulothoracic movements occur concurrently
54
During the first phase or setting phase of the scapulohumeral rhythm, at what joint does most of the movement occur?
glenohumeral joint
55
**CORACOBRACHIALIS**
**_origin:_** coracoid process **_insertion:_** medial side of the shaft of the humerus **_functions:_** * aid in flexion of arm and shoulder joint * aid in adduction of arm and shoulder joint **_innervation_**: musculocutaneous nerve ex: mopping the floor

Anatomy (2 decks)

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