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Year 2 Quarter 2 Anatomy > Brachial plexus > Flashcards

Brachial plexus Flashcards

1
Q

Which nerves create the brachial plexus?

A

C5-C8 and T1

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2
Q

Ordering of the sectioning of the brachial plexus

A

Roots, trunks, divisions, cords, branches

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3
Q

How many roots in the brachial plexus?

A

5

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4
Q

How many trunks are in the brachial plexus?

A

3

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5
Q

How many divisions are in the brachial plexus?

A

6

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6
Q

How many cords are in the brachial plexus?

A

3

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7
Q

How many branches are in the brachial plexus?

A

5

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8
Q

Long thoracic nerve

A

Comes off a root. Travels anterior to the anterior scalene, between the clavicle and rib 1. Innervates the serratus anterior.

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9
Q

Suprascapular nerve

A

Comes off a trunk, travels between the posterior scalene and the upper trapezius. Travels to the scapula and innervated supra and infra spinatus

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10
Q

Medial pectoral nerve

A

Comes off a cord, travels between the pec minor and major. Innervates both pectoralis muscles.

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11
Q

Lateral pectoral nerve

A

Comes off a cord and travels between the pectoralis muscles. Innervates the pec major.

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12
Q

Subscapular nerve

A

Comes off of a cord. Splits int superior and inferior subscapular and thoracodorsal nerves.

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13
Q

Muscles innervated by superior subscapular nerve

A

Subscapularis

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14
Q

Muscles innervated by the thoracodorsal nerve

A

Latissimus dorsi

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15
Q

Muscles innervated by the inferior subscapular nerve

A

Teres major

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16
Q

Dorsal scapular nerve

A

Originates from C5, passes posterior to the middle scalene, then travels along the border of the scapula. Innervates the levator scapula and the rhomboids

17
Q

Nerve to subclavius

A

Originates from a superior trunk. Passes antero-inferior over subclavian artery and vein. Innervates the subclavius

18
Q

Accessory nerve (CN XI)

A

Not a part of the brachial plexus. Descends from the neck to the SCM and trapezius.

19
Q

Branches of the brachial plexus

A

Axillary, musculocutaneous, raidal, median, ulnar.

20
Q

Path of the axillary nerve

A

Comes off of a cord, then travels through the axilla. Divides into anterior and posterior branches and creates a cuff around the deltoid.

21
Q

Muscles innervated by the axillary nerve

A

Deltoid and teres major.

22
Q

Path of the musculocutaneous nerve

A

Comes off of a cord, then travels deep to the pec minor. Pierces the coracobrachialis and travels down the anterior humerus.

23
Q

Muscles innervated by the musculocutaneous nerve

A

Biceps brachii, brachialis, coracobrachialis

24
Q

Path of the radial nerve

A

Comes off of a cord. Travels deep to pec minor and through the axilla then down the posterior humerus between the medial and lateral heads of triceps brachii.

25
Q

Muscles innervated by radial nerve

A

Triceps, anconeus, brachioradialis, most wrist extensors, abductor pollicis, supinator

26
Q

Path of the median nerve

A

Comes off of a cord, then travels deep to the pec minor, through the axilla, pierces pronator teres and then through the carpal tunnel.

27
Q

Muscles innervated by the median nerve

A

Pronator teres, palmaris longus, pronator quadratus, muscles of the thenar eminence, some wrist flexors

28
Q

Path of the ulnar nerve

A

Comes off of a cord, travels deep to the pec minor, through the axilla.

29
Q

Muscles innervated by the ulnar nerve

A

Some wrist flexors, muscles of the hand except for the thenar eminence.

30
Q

Borders of the deltopectoral triangle

A

Clavicle (superior), pectoralis major (medial), anterior deltoid (lateral)

31
Q

Contents of the deltopectoral triangle

A

Cords of the brachial plexus, axillary artery and vein

32
Q

Borders of the cubital fossa

A

Biceps insertion (superior lateral), bicipital aponeurosis (superior medial), pronator teres (inferior medial), brachioradialis (inferior lateral)

33
Q

Contents of the cubital foss

A

Brachial artery and vein, median nerve

34
Q

Floor of the carpal tunnel

A

The 4 intermediate carpal bones (lunate, triquetrum, trapezoid, capitate)

35
Q

Cieling of the carpal tunnel

A

Flexor retinaculum

36
Q

Contents of the carpal tunnel

A

Tendons of FDS, FDP, FCR, FPL and the median nerve

37
Q

Nerves of the brachial plexus which are mixed

A

Musculocutaneous, axillary , median, radial, ulnar

Year 2 Quarter 2 Anatomy (5 decks)

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