A&P 2.11 Brachial Plexus, CN IX, XII Flashcards Preview

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Flashcards in A&P 2.11 Brachial Plexus, CN IX, XII Deck (15)
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Iliocostalis


O, I

O: sacrum and ilium via common tendon (lumborum), inferior borders of ribs 1-12 (thoracic and cervicis

I: inferior border of ribs 1-6 (thoracis), TP of lower cervicals (cervicis)

LUMBORIUM REGION INSERT INFERIOR BORDER 6-12????

1

Cranial nerve IX

Glossophayngeal
Mixed
Function: SENSORY:somatic taste, posterior tongue sensations (touch, pain, temp), proprioception in swallow muscles, visceral- monitor Hb pressure, O2/CO2 in Hb for regulating breathing rate and depth
MOTOR: somatic muscle function of swallowing and speech, ANS stimulates saliva secretion

2

Cranial nerve XII

Hypoglossal nerve

Mostly motor

Function: SENSORY- sensory proprioception from the tongue ,

MOTOR - movement of tongue during speech and swallowing

3

Brachial plexus

C5-T1
UE entirely innervated by brachial plexus branches
Travels from the neck under clavicle, to axilla

MASSAGE ENDANGERMENT SITE IN NECK AND AXILLA

Ventral rami has 5 branches

4

Brachial plexus

5 branches

Musculocutaneous
Axillary
Radial
Ulnar
Median

5

Musculocutaneous

Innervates the shoulder and elbow flexors (biceps, coracobrachialis, brachialis) and most of skin of anterior arm

6

Axillary

Innervates the deltoids, teres minor, and skin over those muscles

7

Radial

Runs thought the spiral groove in the posterior humerus between lateral and medial heads of triceps brachii
Runs from medial in armpit to lateral at the elbow
Innervates the posterior upper limb, triceps, anconeus, wrist, hand and finger extensions and skin of posterior UE

8

Ulnar

Runs down medial arm nest to coracobrachialis, passes behind medial epicondyle on its way to the ulnar side of the forearm
Innervates flexor carpi ulnaris and skin on the ulnar side of forearm and hand.

ENDANGERMENT SITE IN MEDIAL ARM AND BEHIND EPICONDYLE

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Median

Named for location between radial and ulnar nerves
Runs down the medial arm with the ulnar nerve, then passes into the middle of the anterior forearm at the elbow
Innervates most of the wrist and finger flexors (EXCEPT FLEXOR CARPI ULNARIS)
Passes through the carpal tunnel
Innervates the muscles and skin of the anterior side of the first 3.5 phalanges

10

Carpal tunnel syndrome

Compression of the median nerve in the carpal tunnel
- often due to overuse and inflammation of flexor tendons and their sheaths passing through tunnel with nerve
- may also be caused by infection or trauma
- overuse risk activities= keyboards/computers, hair cutting, improper body mechanics while massaging client
Causes pain, tingling and numbness in the palmar side of the first 3.5 digits

11

Carpal tunnel syndrome

Neurological symptoms

Limited to the area innervated by the median nerve, distal to carpal tunnel

May be associated myofascial pain in proximal UE, shoulder and neck, but any neurological symptoms proximal to the wrist are something other than carpal tunnel syndrome

12

Dermatomes

An area of SKIN that provides sensory input to the CNS via the posterior roots of one pair of spinal nerves or via the trigeminal (V) nerve

Innervated by many cutaneous

13

Cutaneous nerve innervation

An area of skin that provides sensory input to the skin FROM A CUTANEOUS BRANCH OF A PLEXUS

A single cutaneous nerve distribution area (median) will contain portions of several dermatomes

14

Myotomes

A map of single motor neuron and skeletal muscle it effects. Tends to follow dermatome patterns in the sense that mytomes lie directly under their associated dermatomes. Single pair of nerve groups.

Example: the muscle that is innervated by C7 lies under the skin that is innervated by C7