nerves of brachial plexus

posterior boundary of axilla

latissimus dorsi

this muscle originates from the the lumbar fascia, portions of the sacrum, iliac crest, ribs and the inferior angle of the scapula and inserts on the humerus. it extends, hyperextends medially rotates and adducts the arm. it is served by the thoracodorsal nerve

latissimus dorsi

this nerve runs along the belly of the biceps brachii

musculocutaneous nerve

this nerves serves the lateral cutaneous area of the forearm

musculocutaneous nerve

lateral cord gives rise to what nerves?

musculocutaneous nerve and half of median nerve.

the median nerve runs with what artery IN THE ARM?

the brachial artery in cats it passes through the supracondyloid foramen

posterior compartment of the arm

triceps brachii

medial cord gives rise to what nerves?

ulnar nerve half of the median nerve

ulnar n.

C8 T1 flexor carpi ulnaris 1/2 of flexor digitorum profundis 15 of 20 muscles in hand

brachial plexus cords

lateral medial posterior

radial n.

C5 C6 C7 C8 T1 brachioradialis triceps brachii extensors in arm and forearm

musculocutaneus n.

C5 C6 C7 coracobrachialis biceps brachii brachialis

axillary n.

C5 C6 deltoid teres minor

median n.

C6 C7 C8 T1 flexors in forearm - fl. dig. superficialias fl. dig profundus fl. carpis radial palmaris longus pronator teres pronator quadratus 5 of 20 muslces in hand

this small muscle in the posterior compartment of the arm is a synergist to the triceps brachii. it is serve by the radial nerve.

anconeus

the trunks of the brachial plexus give rise to these as well as a similar set of structures that pass posteriorly.

anterior divisions

this is the name for a syndrome that is brought about by damage to the median nerve. this results in the loss of the ability to oppose the thumb

ape hand

posterior cord gives rise to what nerves?

axillary and radial nerves

lateral boundary of axilla

biceps brachii coracobrachialis humerus

what is the apex of the axilla?

glenohumeral joint (ball socket joint)

the median nerve runs with what artery in the FOREARM?

radial artery

there is a deep branching of this nerve that goes deep into the posterior compartment of the forearm and serves the extensor muscles and the supinator muscle

radial nerve

medial boundary of axilla

ribs and intercostal muscles covered by serratus anterior

the cords of the brachial plexus give rise to five of theses. four of them go into the arm and one goes out into the shoulder.

branches

this is the most superior ramus that forms the brachial plexus

c5

this it the second from most superior rami of the brachial plexus

c6

this is the third from the most superior ramus that forms the brachial plexus. there is one on each side of the body.

c7

the axillary nerve runs with what artery through muscle?

caudal humeral circumflex artery

this muscle originates on the humerus and inserts on the ulna. it is located on the anterior compartment of the arm and is served by the musculocutaneous nerve. its only action is flexion of the forearm.

brachialis muscle.

this muscle originates on the supralgneoid tubercle and the coracoid process of the scapula, and inserts on the radial tuberosity and biciptal aponeurosis of the forearm. it is capable of causing flexion of the forearm (elbow) and supination of the forearm and hand. it is located in the nateiro compartment of the arm and is served by the musculocutaneous nerve.

bicep brachii muscle

radial nerves goes deep into the arm with what artery?

brachial artery

this vein is observed on the superficial lateral side of the forearm and arm. inferior to the clavicle, it passes into the axilla where it joins the axillary vein. the axillary vein passes through the thoracic wall to become the subclavian vein.

cephalic vein.

this is the name of a syndrome that is brought about by damage to the ulnar nerve. the primary symptom is partial finger flexion of the involved hand, with the most flexion occuring on the medial side of the hand.

claw hand

anterior compartment of the arm

coracobrachialis brachialis biceps brachii

there are three of these structures and two are formed by the merging of the anterior and posterior divisions. one is formed by a single anterior division. they are named for their positions relative to the middle third of the axillary artery.

cords

floor of axilla

covered by skin and axillary hair in adults

this artery is a small branch of the brachial artery. it runs deep into the arm with the radial nerve. in humans it serves the posterior compartment of the arm and forms anastomoses with the posterior humeral circumflex artery. in cats it serves the triceps brachii.

deep brachial artery

this muscle moves the arm. it is the prime flex, abductor, extensor, medial and lateral rotator of the arm. it is served by the axillary nerve.

deltoid muscle

this structure is formed from the anterior divisions of the upper and middle trunks of the brachial plexus. it contains neurons from anterior rami of c5 c6 c7 and it gives rise to the musculocutaneous nerve as well as part of the median nerve. it gets it name from its position relative to the middle third of the axillary artery. it forms the top right side oft eh "m" as you look into it.

lateral cord`

radial nerves emerges on what side of the arm & runs with what vein and runs on what muscles?

lateral side of the arm and cephalic vein into the forearm, and runs on the brachioradialis and serves it too.

this nerve does not go into the forearm

musculocutaneous

anterior boundary of axilla

pectoral muscles

this structure if formed from the posterior divisions of the upper, middle, and lower trunks of the brachial plexus. it contains neurons from anterior ram of c5 c6 c7 c8 and t1, it gives rise to the radial and axillary nerves. it gets it name from its potiion relative to the middle third of the axillary artery. it is deep in the axillary sheath and is difficult to expose.

posterior cord