Flashcards in Brachial plexus Deck (109)
what forms the brachial plexus?
the anterior primary ramus of C5 through T1
The roots receive a gray ramus communicans from where?
the sympathetic trunk
where does the roots pass between on their way to the posterior triangle?
the anterior and middle scalene
what are the three cervical ganglions associated with the roots?
the superior, middle, and inferior (stellate) ganglion
where do the roots pass after the posterior triangle?
posterior and superior to subclavian artery
What are the trunks of the branchial plexus?
Superior, Middle, Inferior trunk
what roots make of the superior trunk
C5 and C6
what roots make up the middle trunk
what roots make up the inferior trunk
C8 and T1
what do the trunks pass over before they arrive in the axilla
over rib 1
what does each trunk split into?
anterior and posterior division
what supplies the anterior compartment of the arm and forearm
what supplies the posterior compartments of the arm and forearm
What is formed by the anterior division of the superior and middle trunk?
the lateral cord contains fibers from which roots?
C5, C6, and C7
the lateral cord produces which nerves?
musculocutaneous and 1/2 median
what lies lateral to the second part of the axillary artery
what is made from the anterior division of the inferior trunk
the medial cord contain fibers from which roots
what lies medial to the second part of the axillary artery
what is nerves come from the medial cord
ulnar, and 1/2 median
what is formed by the union of the posterior division of all three trunks?
the posterior cord contains fibers from which roots
C5, C6, C7, C8, and T1
what nerves come from the posterior cord
axillary and radial nerve
what lies posterior to the second part of axillary artery
the dorsal scapular nerve contains fibers from which root
what muscles are supplied by the dorsal scapular nerve
levator scapula, rhomboid major, rhomboid minor
which muscle supplied by the dorsal scapular nerve that also receives fiber from another root and what roots are they?
levator scapula from C3 and C4
what nerves are from from roots of the brachial plexus
dorsal scapular nerve and long thoracic nerve