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A&P II > Musculoskeletal Anatomy UE > Flashcards

Musculoskeletal Anatomy UE Flashcards

1
Q

Elbow and Radioulna muscles

A

Biceps Brachii Brachialis Brachioradialis Pronator teres Pronator Quadratus Supinator Triceps Anconeus

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2
Q

Musculocutaneous Nerve

A

Biceps Brachii Brachialis

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3
Q

Median Nerve

A

Pronator Teres Pronator Quadratus

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4
Q

Radial Nerve

A

Triceps brachii Supinator Ancoueus brachioradialis

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5
Q

biceps brachii

A

O: scapula A: elbow flexion, forearm supination N: musculocutaneous

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6
Q

Brachialis

A

O: distal half of humerus A: elbow flexion N: musculocutaneous

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7
Q

Pronator Teres

A

A: Pronate forearm / weak flexion of elbow O: medial condyloid ridge of humerus/ medial side of ulna N: Median Nerve

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7
Q

brachioradialis

A

O: epicondyle of humerus A: elbow flexion, supinates and pronates from the mid-position N: Radial

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8
Q

Supinator Muscle

A

A: supination of forearm O: lateral condyloid ridge of humerus/posterior part of ulna N: Radial Nerve

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9
Q

Pronator Quadratus

A

A: Pronate forearm O: Distal 1/4th of ulna N: Median Nerve

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11
Q

Triceps brachii

A

O: scapula A: elbow extension, a weak shoulder extensor N: radial

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12
Q

Anconeus Muscle

A

A : Elbow Extension O: posterior surface of the lateral condyle of the humerus N: Radial Nerve

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13
Q

Elbow Joint

A

articulation of humerus with the ulna and radius Hinge joint Only motions are flexion and extension The olecranon process which fits into the olecranon fossa of the humerus blocks hyperextension. Range of Motion: 0 -145 degrees.

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14
Q

Radioulnar Joint

A

Formed by the articulation between the radius and the ulna. They articulate both proximally and distally Pivot Joint Motions: Supination/Pronation The radius moves around the ulnar.

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15
Q

Palmaris Longus

A

wrist flexion innervated by median nerve 12% of the population is missing this muscle

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16
Q

Wrist Flexors

A

Flexor Carpi Radialis- med Flexor Carpi Ulnaris- uln Palmaris Longus- med All origin medial epicondyle of humerus

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18
Q

Flexor Carpi Ulnaris

A

wrist flexion/ular deviation Innervated by the ulnar nerve

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19
Q

Flexor Carpi Radialis

A

wrist flexion/radial deviation Innervated by the median nerve

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20
Q

Wrist Extensors

A

Extensor carpi radialis longus Extensor carpi radialis brevis Extensor carpi ulnaris All are innervated by the radial nerve Origin of these muscles is the lateral epicondyle of the humerus.

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21
Q

Intrinsic Muscles of the hand

A

Both the origin and insertion of these muscles are in the wrist/hand. These are small muscles that allow us to perform fine motor movements Thenar muscles Hypothenar muscles Adductor pollicis Interossei Lumbricales

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22
Q

The Thumb

A

referred to as digit #1 3 joints are : Carpo-metacarpal joint, CMC, metacarpal-phalangeal (MCP) joint and the the interphalangeal joint ( IP) joint

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23
Q

Muscles of Thumb Extension

A

Extensor pollicis brevis - (CMC and MCP) Radial Nerve Extensor pollicis longus – (CMC, MCP, IP Radial Nerve

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24
Q

Muscles of thumb Flexion

A

Flexor pollicis brevis-(CMC and MCP /Median Nerve Flexor pollicis longus- (CMC,MCP,IP) Med Nerve

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25
Q

Muscles of Thumb Abduction

A

Abductor pollicis brevis (abducts CMC ) median nerve Abductor pollicis longus ( Abducts CMC) – Radial Nerve

26
Q

Muscles of Thumb Adduction

A

Adductor Pollicis (CMC joint) –ulnar nerve

27
Q

Interossei

A

Muscles between the bones. O: between the metacarpals I: proximal phalanx(es) Dorsal (4): abduct the fingers (DAB) Palmar (3): adduct the fingers (PAD) Ulnar N.

28
Q

Lumbricles

A

O: flexor digitorum profundus I: extensor digitorum of respective finger. They flex the MCP joint and extend the PIP joints. Split innervation: index/middle:median n. Ring/little : ulnar nerve

29
Q

Flexor Digitorum Superficialis

A

Flexes the MCP and PIP of fingers – Median N.

30
Q

Flexor Digitorum Profundus

A

Flexes all 3 joints of fingers split innervation (median –digits 2 and 3, ulnar n goes to digits 4 and 5.

31
Q

Extensor digitorum

A

extends all 3 joints of the fingers – radial nerve

32
Q

Extensor Indicis

A

extends the 3 joints of the index finger – radial nerve

33
Q

Muscles of Thumb Opposition

A

Opponens pollicis (opposes @ CMC jt.) – Median N.

37
Q

Arches of the hand

A

When relaxed – the palm assumes a cupped position. There are 3 arches responsible for this. Proximal carpal arch ,distal carpal arch and the longitudinal arch. – These arches contribute to the various grasps of the hand.

38
Q

Metacarpo-phalangeal Joint: ( MCP)

A

2-5 Movement : flexion/extension, abduction/adduction. Knucles

39
Q

Brachial plexus

A

A nerve plexus originating from the ventral branches of the last four cervical (C5-C8) and first thoracic spinal nerves. The brachial plexus gives off the principle nerves that serve the shoulder, chest, and arm

40
Q

Axillary Nerve (BP)

A

C5,C6 SD: Lateral arm over lower portion of deltiod MF: loss of protraction, weakened shoulder lateral rotation

41
Q

Musculocutaneous Nerve (BP)

A

C5,C6 SD: anterior lateral surface of forearm MF: loss of elbow flexion, weakened supination

42
Q

Radial Nerve (BP)

A

C6-C8,T1 SD: post arm, post forearm, and radial side of post hand MF: loss of elbow, wrist, finger, and thumb extension (wrist drop)

43
Q

Median Nerve (BP)

A

C6-C8, T1 SD: palmar aspect of thumb, 2nd, 3rd, 4th fingers MF: loss of forearm pronation. loss of thumb oppos, flexion and ABD, weakened wrist flexors, weakened radial deviation. weakened 2nd and 3rd finger flexion

44
Q

Ulnar Nerve (BP)

A

C8, T1 SD: 4th and 5th finger MF: loss of ulnar deviation. weakened wrist, finger flexion. loss of thumb ADD. loss of most intrinsics (claw hand)

45
Q

Hypothenar eminence

A

Move the pinky Flexor digiti minimi Abductor digiti minimi Opponens digiti minimi All are innervated by the ulnar nerve

46
Q

Muscles of the Shoulder Girdle (5)

A

All of the muscles cause movement of the scapula All have origin on the axial skeleton and insertions on the scapula and/or clavicle 1.Pectoralis minor 2.Serratus anterior 3.Trapezius 4.Rhomboids 5.Levator scalpulae

47
Q

Pectoralis Minor

A

Actions: protraction, downward rotation and depression. -O axial skeleton / I- coracoid process of scapula N- Medial pectoral nerve C8,T1

48
Q

Serratus Anterior

A

Action: abduction ( protraction) and upward rotation O – axial skeleton /I – scapula N- Long thoracic nerve C5-C7

49
Q

Trapezius

A

Action:: elevate, depress, and upward rotation O – axial skeleton ; I clavicle/scapula N- Spinal accessory C3,C4

50
Q

Rhomboids

A

Action: Adduction ( Retraction), downward rotation, and elevation. O – axial skeleton I – medical border of scapula N-Dorsal scapular nerve C5

51
Q

Levator Scalpulae

A

Action: elevation; downward rotation O – axial skeleton I – scapula N- C3-C5

52
Q

Muscles of the Glenohumeral/Shoulder Joint

A

All muscles move the humerus Deltoid Coracobrachialis Teres Major Rotator Cuff group ( supraspinatous, infraspinatous, subscapularis, teres minor) Latissimus Dorsi Pectoralis Major

53
Q

Pectoralis Major

A

O: clavicle/anterior surface of ribs 1-6 I : bicipital grove of the humerus A: horizontal adduction, flexion, internal rotation and adduction N- Lateral and medial pectoral nerve C5-C8, T1

54
Q

Coracobrachialis

A

O: coracoid process of scapula I: Medial border of humerus shaft A: Shoulder flexion /Horizontall adduction N: musculocutaneous nerve

55
Q

Deltoid

A

Anterior, Middle, Posterior NA:Shoulder abd, flx, ext, external rotation, horizontal shoulder adduction and abduction N- Axillary Nerve C5-C6

56
Q

Rotator Cuff Muscles (SITS)

A

SITS- subscapularis, infraspinatous, teres minor, and supraspinatous responsible for keeping the humeral head in its proper position within the glenoid cavity

57
Q

Subscapularis (Rotator Cuff Muscle)

A

O: subscapula fossa of scapula I : Lesser tubercle of the humerus A : internal rotation N: Subscapular C5,C6

58
Q

Infraspinatous (Rotator Cuff Muscle)

A

O : Infraspinatous fossa I : Greater tubercle A : horizontal abduction, external rotation N: Suprascapular C5,C6

59
Q

Teres Minor (Rotator Cuff Muscle)

A

O : lateral aspect of scapula I : Greater tubercle A : external rotation , adduction N: Axillary C5,C6

60
Q

Supraspinatus (Rotator Cuff Muscle)

A

O : Supraspinatous fossa I : Greater tubercle A : Weak abduction ( * stabilizes the head of the humerus in the glenoid fossa) N: Suprascapular C5,C6

61
Q

Teres Major

A

O : Inferior angle of the scapula I : lesser tubercle A : internal rotation, extension, adduction N: Subscapular C5-C7

62
Q

Latissmus dorsi

A

O : Sacrum/lumbar region of spine I : Medial side of the bicipital grove A : adduction, horizontal adduction, hyperextension,extension, and internal rotation N: Thoracodorsal C6-C8

A&P II (11 decks)

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