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31 Cards in this Set
- Front
- Back
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what general parts make up the brachial plexus?
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roots, trunks, divisions, cords and nerves (most of which arise from the cords)
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what spinal nerves form the roots of the brachial plexus?
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c5, c6, c7, c8 and t1
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what spinal nerves make up the upper trunk?
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c5 and c6
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what spinal nerve(s) make up the middle trunk of the brachial plexus?
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c7
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whawt spinal nerves unite to form the lower trunk of the brachial plexus?
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c8 and t1
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Each of the trunks dvide into what?
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into an anterior division and a posterior division
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how is the lateral cord formed?
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by the anterior divisions of the upper and middle trunk
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how is the medial cord formed?
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by the anterior division of the lower trunk
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how is the posterior cord formed?
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by the three posterior divisions of the upper, middle and lower turnks.
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what nerve arises from the upper trunk?
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the suprascapular nerve
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what nerve arises soley from the lateral cord?
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the musculocutaneous nerve
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which nerve arises from the medial cord?
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the ulnar nerve
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which nerve arises from part of the lateral cord and the medial cord?
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the median nerve
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the posterior cord divides into what two nerves?
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the axillary and the radial nerves.
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name the nerve fibers of the ulnar nerve.
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c8 and t1
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name the nerve fibers of the axillary and suprascapular nerves.
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c5 and c6
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name the nerve fibers of the musculocutaneous nerve.
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c5 and c6
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name the major parts at the lower end of the humerus.
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the lateral epicondyle, capitulum, trochlea, and medial epicondyle.
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name the major parts at the upper end of the radius.
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the head and neck of the radius.
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name the major parts at the upper end of the ulna.
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olecranon process and trochlear notch.
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the capitulum of the humerus articuloates with the head of the radius and the trochlea of the humerus artiulates with the trochlear notch of the ulna, in what joint?
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the elbow joint.
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what does the elbow joint provide?
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for the flexion and extension of the forearm.
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describe biceps brachii.
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flexes and supinates the forearm; innervated by the musculocutaneous nerve
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describe brachialis.
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flexes the forearm; innervated by the musculocutaneous nerve
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describe triceps brachii.
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extends the forearm; innervated by the radial nerve.
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the biceps tendon reflex test assesses spinal cord reflex activity where?
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c5 and c6 levels of the spinal cord.
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the triceps tendon reflex test assesses spinal cor reflex activity where?
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c7 and c8 levels of the spinal cord
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the proximal and distal radioulnar joints are formed by what?
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the radius and ulna articulate with each other at their upper and lower ends
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what do the proximal and distal radioulnar joints provide for?
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the pronation and supination of the forearm.
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what does an upper brachial plexus injury involve?
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the c5 and c6 roots and/or the upper trunk.
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what is erb's palsy?
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loss of the muscles deltoid and biceps brachii maybe by an upper brachial plexus injury.
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