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Anatomy 1 > Lecture 13 - Arm, Elbow, and Forearm > Flashcards

Lecture 13 - Arm, Elbow, and Forearm Flashcards

1
Q

Biceps brachii

Innervation and action

A

Nerve: Musculoucutaneous nerve (C5, C6)
Action: Supinates forearm, and when supine flexes forearm. Short head resists dislocation of shoulder

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2
Q

Brachialis

Innervation and action

A

Nerve: Musculoucutaneous nerve (C5, C6)
Action: Flexes forearm in all positions

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3
Q

Coracobrachialis

Innervation and action

A

Nerve: Musculoucutaneous nerve (C5, C6, C7)
Action: Helps flex and adduct arm, resists dislocation of the shoulder

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4
Q

Rupture results in “Popeye Deformity” of what tendon?

A

Long head of biceps tendon

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5
Q

Triceps brachii

Innervation and action

A

Nerve: Radial Nerve (C6, C7, C8)
Action: Chief extensor of forearm, long head resists dislocation of humerus, important during abduction

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6
Q

Anconeus

Innervation and action

A

Nerve: Radial Nerve (C7, C8, T1)
Action: Assists triceps in extending forearm, stabilizes elbow joint, may abduct ulna during pronation

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7
Q

Important nerve/artery through Triangular space

A

-Circumflex scapular artery

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8
Q

Important nerve/artery through Quadrangular space

A
  • Post. Circumflex humeral artery

- Axillary nerve

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9
Q

Important nerve/artery through Triangular interval

A
  • Radial Nerve

- Deep artery of the arm

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10
Q

Veins used for blood draw

A

Median cubital or basilic

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11
Q

Cubital fossa borders

A

Line connecting the humeral epicondyles
Medially by the pronator teres
Laterally by the brachioradialis

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12
Q

Superficial group of anterior forearm

A

Pronator teres
flexor carpi radialis
palmaris longus
flexor carpi ulnaris

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13
Q

Intermediate group of anterior forearm

A

Flexor digitorum superficialis

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14
Q

Deep group of anterior forearm

A

Flexor pollicis longus
flexor digitorum profundus
pronator quadratus

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15
Q

Superficial group of anterior forearm innervation

A

All median nerve except

Flexor carpi ulnaris - Ulnar nerve

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16
Q

Pronator teres action

A

Pronates forearm

17
Q

Flexor carpi radialis action

A

Flexes and abducts wrist

18
Q

Palmaris longus action

A

Flexes wrist

19
Q

Flexor carpi ulnaris action

A

Flexes and adducts wrist

20
Q

Flexor digitorum superficialis action

A

flexes PIP joints of digits 2-5

21
Q

Flexor pollicis longus action and innervation

A

Action: flexes IP joint of thumb
Innervation: anterior interosseous nerve

22
Q

Flexor digitorum profundus action and innervation

A

Action: flexes DIP joints of digits 2-5, can assist with wrist flexion

Innervation:
Laterally: Median nerve (anterior interosseous)
Medially: ulnar nerve

23
Q

Pronator quadratus action and innervation

A

Action: pronates forearm
Innervation: anterior interosseous nerve

24
Q

Superficial group of posterior forearm

A 
Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris
25
Q

Deep group of posterior forearm

A 
Supinator
Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
Extensor indicis
26
Q

Brachioradialis action

A

Unusual in that it flexes forearm

27
Q

Extensor Carpi Radialis Longus & Brevis action

A

Extend and abduct hand at wrist

28
Q

Extensor digitorum action

A

Tendons reach digits 2-5
Intertendinous connections form extensor expansions

extensor expansions: Contribute to coordinated movements of the interphalangeal joints

29
Q

Extensor digiti minimi action

A

Typically divides into two tendons with the lateral one joined by the tendon of extensor digitorum to the little finger
Provides independent extension of the little finger or acts with extensor digitorum

30
Q

Extensor carpi ulnaris action

extends and adducts the hand at the wrist joint

A

extends and adducts the hand at the wrist joint

31
Q

Supinator action

A

Supination

32
Q

Abductor pollicis longus action

A

Abducts and extends the first CM joint

33
Q

Extensor pollicis brevis action

A

Extends the MP joint and helps extend the CM joint

34
Q

Extensor pollicis longus action

A

Tendon passes medial to the dorsal tubercle of the radius, using it as a pulley
Inserts into the distal phalanx of the thumb
Extends the IP, MP, and CM joints of the thumb
Forms the posterior boundary of anatomical snuff box

35
Q

Extensor indicis action

A

may act with extensor digitorum or may independently extend the index finger

Anatomy 1 (14 decks)

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