Brachial Plexus Flashcards
which part of brachial plexus is supraclavicular?
roots and trunks
which part of brachial plexus is at the clavicle?
divisions
which part of brachial plexus is infraclavicular?
cords and branches
true or false
Because the brachial plexus is made up of ventral rami of nerves, it is only motor.
False
plexus roots have all modalities and innervation
what nerve comes off of C5 root of ventral rami?
dorsal scapular nerve
what spinal nerve roots compose the long thoracic nerve?
C5, C6, C7
Where does the Nerve to subclavius and supra scapular nerves come into contact with brachial plexus?
upper trunk
where does supra scapular nerve join the brachial plexus?
upper trunk
where does nerve to subclavius join brachial plexus?
upper trunk
what cords are the anterior compartment?
lateral and medial cord
what nerves branch from medial cord
medial pectoral nerve
medial brachial cutaneous nerve
medial ante brachial nerve
what nerves branch from posterior cord
upper sub scapular nerve
lower sub scapular nerve
thoracodorsal nerve
which nerve of the major terminal branches compose the anterior compartment
musculocutaneous
median
ulnar
which nerve of the major terminal branches compose the posterior compartment
radial
axillary
what nerve is in the anterior compartment of the arm? what is its function?
Musculocutaneous nerve
flexors of elbow joint
what nerve is in the posterior compartment of the arm? what is its function?
radial nerve
extensors of elbow joint
what nerve is in the anterior compartment of the forearm and hand?
ulnar and median nerves
what nerve is in the posterior compartment of the arm?
radial nerve
presentation of this disorder causes upper limb adduction, medially rotated and elbow is extended and wrist is flexed
erb’s palsy
sensory and motor defects of erbs palsy
sensory: lateral aspect of upper limb
motor: loss of arm abduction, loss of elbow flexion, loss of forearm supination, weakness of wrist extension
where do injuries causing Erb’s palsy occur? what causes them?
superior trunk (C5 and C6 spinal nerve roots) excessive, forceful increase in angle between neck and shoulder
