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10 Cards in this Set
- Front
- Back
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Anatomy of the Brachial Plexus. where is it formed, innervation, what nerves.
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Formed by the ventral (ant) rami
C5-T1 (occasionally C4 and T2) Through the neck, axilla & arm Cutaneous and muscular innervation of the entire upper limb |
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What are the branches?
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Muscuclocutaneous C5-C7
Axillary (C5,C6) Radial Nerve (C5-T1) Median (C5-T1) Ulnar (C7-T1) |
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Musculocutaneous nerve
Motor and Sensory |
the muscle beach enrve
-Biceps brachii -brachialis -coracobrachicalis SENSORY: Lateral skin distal to the elbow. |
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What is the Axillary Nerve? Motor , Sensory
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The axillary nerve is the militant nerve.
MOTOR: Deltoid, Teres Minor Sensory: Caspule of the shoulder, skin of the shldr "Regimental Badge of the Axillary Nerve" |
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What is the Radial Nerve>
Morot, Sensory |
Radial NErve is the GREAT EXTENDER
MOTOR: Triceps Brachi -Supinator -Aceoneus -Supinator SENSORY: Dorsolateral surface of hand & arm |
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Names and innervations for the TRUNK?
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Superior or Upper: C5-C6
MIDDLE : C7 INFERIOR or Lower (C8-T1) |
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breakdown for the divisions.
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SIX DIVISION: form the 1st RIb
ANTERIOR DIVISAION: upper middle, lower trunks= FLEXORS POSTERIOR DIVISION + upper , middle, lower , trunks= EXTENSORS. |
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breakdown of the cords.
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six division regour ot become 3 cords:
1.-POSTERIOR: the 3 posterior division of the trunk, (C5-T1) 2. LATERAL CORD: anterior division of the upper and middle trunk (C5-C7) 3. MEDIAL CORD- a contuation of the lower trunk (C8-T1) |
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The brachial plexus is responsible for the cutaneous and muscular innervation of the entire upper limb. What are the 2 exceptions
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2 excetptions are the trapezius muscle, inenrvated by the spinal accessory nerve (CNXI), 2) the area of the skin near the axilla innervated by the intercostobrachialis nerve.
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Musculoucutaneous nerve:what is its course: Jenns notes
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-leaves the fasical sheath of the plexus approx at leevel of the coracoid process.
-pierces the coracobrachialis muscle just distal to the pectorialis major. -contues as the 2 branches (ant/post) of the lateral antebrachia cutaneous nerve of the forearm at the antecubital fossa -courses along the lateral aspect of the forearm. |
