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31 Cards in this Set

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