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MSK > Upper Extremities: Muscles, Innervations, & Blood Supply > Flashcards

Upper Extremities: Muscles, Innervations, & Blood Supply Flashcards

1
Q

Pectoralis Major M.

A

Innervation: Medial & Lateral Pectoral Nerves

Blood Supply: Pectoral Branch of the Thoracoacromial Trunk

Action:
Medially rotate humeral head
Protract scapula
depress scapula

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2
Q

Pectoralis Minor M.

A

Innervation: Medial Pectoral Nerve

Blood Supply: Pectoral Branch of the Thoracoacromial Trunk

Action:
stabilize the scapula by depression and protraction

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3
Q

Serratus Anterior M.

A

Innervation: Long thoracic Nerve

Blood Supply: Lateral Thoracic Artery

Action:
protract scapula
rotate glenoid cavity superiorly because serratus anterior binds to the medial border of the scapula

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4
Q

Subclavius M.

A

Innervation: Subclavian Nerve

Blood Supply: Acromial Branch of the Thoracoacromial Trunk

Action: Stabilize clavicle and depress clavicle

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5
Q

Supraspinatus M.

A

Innervation: Suprascapular Nerve

Blood Supply: Supracscapular Artery of the Thyrocervical Trunk

Action:
Abduct humerus because it is attached to medial portion of the humerus (greater tubercle)
Hold humeral head in the glenoid fossa of the scapula

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6
Q

Infraspinatus M.

A

Innervation: Suprascapular Nerve

Blood Supply: Suprascapular Artery of Thyrocervical Trunk

Action:
laterally rotate humerus as it is attached to the posterior aspect of humerus
Holds the humeral head in the glenoid cavity

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7
Q

Teres Major M.

A

Innervation: Subscapular Nerve

Blood Supply: Circumflex Scapular Artery

Action: adducts the humerus closer to the body
medially rotates the humerus

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8
Q

Teres Minor M. *

A

Innervation: Axillary Nerve

Blood Supply: Posterior Circumflex Humeral Artery

Action: laterally rotate the humerus
holds humeral head in glenoid cavity

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9
Q

Deltoid M. *

A

Innervation: Axillary Nerve

Blood Supply: Posterior Circumflex Humeral Artery

Action: helps flex the shoulders above the head

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10
Q

Coracobrachialis M.

A

Innervation: Musculocutaneous Nerve

Blood Supply: Brachial Artery

Action: Adducts humerus
Flex humerus

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11
Q

Brachialis M.

A

Innervation: Musculocutaneous Nerve

Blood Supply: Brachial Artery

Action: Flexes the forearm because its insertion is on the ulnar tuberosity

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12
Q

Longhead of Biceps Brachii M.

A

Innervation: Musculocutaneous Nerve

Blood Supply: Brachial Artery

Action: Flex humerus
Flex supine forearm
Supinate forearm

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13
Q

Short Head of Biceps Brachii M.

A

Innervation: Musculocutaneous Nerve

Blood Supply: Brachial Artery

Action: Flex humerus
Flex supine forearm
Supinate forearm

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14
Q

Longhead of Triceps Brachii M.

A

Innervation: Radial Nerve

Blood Supply: Deep Brachial Artery

Action: Resist shoulder dislocation (attached to lateral
border of scapula)
Extend elbow

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15
Q

Medial Head fo Triceps Brachii M.

A

Innervation: Radial nerve

Blood Supply: Deep Brachial Artery

Action: Resist shoulder dislocation
Extend elbow

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16
Q

Lateral Head of Triceps Brachii M.

A

Innervation: Radial nerve

Blood Supply: Deep Brachial Artery

Action: Resist shoulder dislocation
Extend Elbow

17
Q

Aconeus M.

A

Innervation: Radial Nerve

Blood Supply: Middle Collateral Branch of Deep Brachial Artery

Action: Extend Elbow with Triceps brachii muscle
Stabilizes elbow joint

18
Q

Flexor Carpii Radialis M.

A

Innervation: Median Nerve

Blood Supply: Ulnar Artery

Action: Abduct hand at wrist

Inserts at medial epicondyle–> base of 2nd metacarpal bone

19
Q

Palmaris Longus M.

A

Innervation: Median Nerve

Blood Supply: Ulnar Artery

Action: Flex hand at wrist
Inserts at medial epicondyle and attaches to palmar aponeurosis

20
Q

Flexor Carpii Ulnaris M.*

A

Innervation: Ulnar Nerve

Blood Supply: Ulnar Artery

Action: Adduct hand at wrist

Inserts at medial epicondyle and attaches at the pisiform bone

21
Q

Pronator Teres M.

A

Innervation: Median Nerve

Blood Supply: Ulnar Artery

Action: Pronates forearm
flexes forearm

Inserts at the medial epicondyle and attaches at the lateral aspect of the radius

22
Q

Flexor Digitorium Superficialis M.*

A

Innervation: Ulnar Nerve

Blood Supply: Ulnar Artery

Action: Flexes the metacarpophalangeal joints at the wrist
Flexes forearm
Flexes hand at wrist

Inserts at medial epicondyle and attaches at the phalanges 2-5

23
Q

Flexor Digitorum Profundus M.

___

A

Innervation: Anterior Interosseous Nerve of Median Nerve

Blood Supply: Anterior Interosseous Artery

Action: Flexes the hand at the wrist
Inserts at medial epicondyle and extends all the way to the tips of all the fingers 2-5

24
Q

Flexor Pollicus Longus M. **

A

Innervation: Anterior Interosseous Nerve of Median Nerve

Blood Supply: Anterior Interosseous Artery

Action: flexes the first carpometacarpal joint
flexes the wrist at the hand
flexes the 1st metacarpophalangeal joint

Inserts in the interosseous membrane and the anterior aspect of radius –> phalanx of the pollex

25
Q

Pronator Quadratus M. **

A

Innervation: Anterior Interosseous Nerve of Median Nerve

Blood Supply: Anterior Interosseous Artery

Action: Pronate the forearm
Insert at distal ulnar end to the distal radius end

26
Q

Brachioradialis M.

A

Innervation: Radial Nerve

Blood Supply: Radial Recurrent Artery

Action: Flex forearm

Inserts at supracondylar ridge of the humerus to the lateral distal aspect of the radius

27
Q

Extensor Carpi Radialis Longus M.

A

Innervation: Radial Nerve

Blood Supply: Radial Artery

Action: Extend the hand at the wrist

Attaches to the 2nd metacarpal from the supracondylar ridge of the humerus

28
Q

Extensor Carpi Radialis Brevis M.

A

Innervation: Deep Radial Nerve

Blood Supply: Radial Artery

Action: Extend the hand at the wrist

Attaches to the lateral epicondyle of the humerus to the 3rd metacarpal bone

29
Q

Extensor Digitorum M.

A

Innervation: Posterior Interosseous Nerve

Blood Supply : Interosseous Recurrent and Posterior Interosseous artery

Action: extend the hand at the wrist
Attaches to the lateral epicondyle and extends all the way down to digits 2-5

30
Q

Extensor Digiti Minimi M.

A

Innervation: Posterior Interosseous Nerve

Blood Supply: Interosseous Recurrent Artery

Action: extend hand at wrist

Attaches to the lateral epicondyle of the humerus and extends all the way to the 5th digit insertion

31
Q

Extensor Carpi Ulnaris Muscle

A

Innervation: Posterior Interosseous Nerve

Blood Supply: Ulnar Artery

Action: extends hand at wrist

Attaches to the lateral epicondyle to the 5th digit on posterior side

32
Q

Extensor Indicis Muscle

A

Innervation: Posterior interosseous nerve

Blood Supply: Posterior Interosseous Artery

Action: extend hand at wrist
Attaches to the posterior aspect of the distal ulna and attaches to the 2nd digit via aponeurosis till the tip

33
Q

Abductor Pollicis Longus (Outcropping muscle) M.

A

Innervation: posterior interosseous nerve

Blood Supply: Posterior Interosseous Artery

Action: abduct the pollex (thumb)

Attaches from the distal end of the radius all the way to the base of the 1st metacarpal of the pollex

34
Q

Extensor Pollicis Brevis M. (Outcropping Muscle)

A

Innervation: Posterior Interosseous Nerve

Blood Supply: Posterior Interosseous Artery

Action: Extend the pollex (thumb)

Attaches from the posterior end of the radius all the way to the base of the 1st proximal phalanx

35
Q

Extensor Pollicis Longus M. (Outcropping Muscle)

A

Innervation: posterior interosseous Nerve

Blood Supply: Posterior Interosseous Artery

Action: Extend the pollex (thumb)

Attaches from the posterior end of the radius to the 1st distal phalynx of the pollex (thumb)

MSK (11 decks)

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