Arm Neurology Flashcards by Eric Pohlen

Cervical Plexus

anterior rami: C1-4

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Supraclavicular N

C3-C4
lateral supraclavicular N
Middle supaclavicular N
medial supraclavicular N

cutaneous innervation to the skin over the neck and shoulder

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Anterior Ramus orgins: Dorsal Scapuar N

goes to Rhomboid Major M
Rhomboid Minor M
and Levator Scapulae

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Anterior Ramus orgins: Long thoracic N

C5, C6, C7

Serratus Anterior M

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Anterior Ramus orgins: Superior trunk

C5, and C6

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Anterior Ramus orgins: middle trunk

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Anterior Ramus orgins: inferior trunk

C8 and T`1

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Anterior Ramus orgins: suprascapular N

C5 and C6

supraspinatus and infraspinatus M

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Anterior Ramus orgins: subclavian M

C5-C6

subclavius M

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Anterior Ramus orgins: lateral cord

C5, C6, C7

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Anterior Ramus orgins: posterior Cord

C5, C6, C7, C8, T1

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Anterior Ramus orgins: Medial Cord

C8 and T1

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Anterior Ramus orgins: lateral pectoral N

C5, C6,C7,

Pectoralis Major M

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Anterior Ramus orgins: superior subscapular N

C5, C6

Subscapularis M

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Anterior Ramus orgins: Thoracodorsal N

C8, C7, C6

Latissimus Dorsi M

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Anterior Ramus orgins: inferior subscapular N

C5, C6

subscapularis and teres Major M

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Anterior Ramus orgins: medial pectoral N

C8, T1

pectoralis minor and pectoralis major

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Anterior Ramus orgins: medial brachial cutaneous N

C8, T1

skin on the medial arm

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Anterior Ramus orgins: medial antebrachial cutaneous N

C8, T1

skin of medial forearm

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Anterior Ramus orgins: Musculocutaneous N

C5, C6, C7

Coracobrachialis M
Biceps brachii M
Brachialis M

Anterior Ramus orgins: lateral antebrachial cutaneous N

C7 and C6

Skin on the lateral forearm

Anterior Ramus orgins: Axillary N

C5, C6

Deltoid M
Teres Minor M

Anterior Ramus orgins: Radial N

C5, C6, C7, C8, T1

goes to upper extremity

Anterior Ramus orgins: superior lateral brachial cutaneous N

C5, C6

skin on your superior lateral arm

Anterior Ramus orgins: Median N

C5, C6, C7, C8, T1 upper extremity

Anterior Ramus orgins: Ulnar N

C7, C8, T1 upper extremity

Anterior Ramus orgins: medial antebrachial cutaneous N

C8, T1 skin on medial forearm

superior lateral brachial cutaneous nerve characteristics

branches off the axillary nerve innervates skin on the superior lateral Arm

Lateral antebrachial cutaneous N characteristics

branches off the musculocutaneous N and innervates the skin of the lateral forearm

Median nerve Innervations

Pronator teres M Flexor Carpi radialis M Flexor digitoum superficialis M Palmaris Longus

Anterior Interosseous N innervations

Branch of Median N lateral 1/2 flexor digitorum profundus M Flexor pollicis longus M Flexor quadratus M

Palmar Cutaneous Branch median N | innervations

branch of median N innervates the skin of the palm of the hand (wrist)

Recurrent branch of Median N innervations

branch of median N Flexor pollicis brevis M (superficial head) Abductor pollicis Brevis M Opponens Pollicis M

Medial branch of the median N innervations

branch of median N 2nd lumbrical M common palmar digital N proper palmar digital N (innervate the skin of digits as well palmar side and the tips of the dorsal side) only goes up lateral side of the 4th digit

Lateral branch of the median N innervations

branch of Median N 1st lumbrical M common palmar digital N proper palmar digital N

Ulnar Nerve innervations

flexor carpi ulnaris M | medial 1/2 pf flexor digitorum profundus M

Dorsal cutaneous Branch Ulnar N innervations

branch of Ulnar Nerve skin of the dorsal hand

Palmar cutaneous branch Ulnar N innervations

branch of the Ulnar Nerve innervates the skin on the palm of the hand ( medial 1/2 4th digit and the 5th digit)

Deep Ulnar N

abductor digiti Minimi M Flexor digiti minimi M opponens digiti minimi M ``` fexor pollicis brevis M (deep head) Adductor Pollicis M 3rd and 4th lumbrical M Dorsal Interossei M Palmar interossei M ```

Superficial Ulnar N

common palmar and proper palmar digital N of the 5th and half the 4th digit

Posterior Brachial Cutaneous N innervations

branch of Radial Nerve Skin on posterior Arm

Radial N innervations

Triceps Brachii M Anconeous M Brachioradialis M Extensor Carpi Radialis Longus M

Inferior Lateral Brachial Cutaneous N

Branch of the Radial Nerve innervates the skin of the inferior lateral aspect of the arm

Superficial Radial N innervations

Branch of the Radial N gives rise to the Dorsal Digital N and the Digital branches Dorsal Digital N (skin on the dorsal lateral side)

Posterior Antebrachial Cutaneous N innervations

branch of the radial Nerve innervates the skin of the posterior arm

Deep Radial N innervations

branch of the Radial N innervates Extensor carpi radialis brevis M Suppinator M

Posterior Interosseous N innervation

changing of the the deep brachial N after it passes the supinator ``` innervates: Extensor digitorum M Extensor digiti Minimi M Extensor carpi Ulnaris M Extensor indicis M Abductor Pollicis Longus M Extensor Pollicis Longus M Extensor Pollicis Brevis M ```

Intercostobrachial N

T2 travels laterally to provide sensory cutaneous innervation to the uppermost medial aspect of the brachium