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+--- Thread: q10_________ - fmg8 (/showthread.php?tid=779017)
q10_________ - fmg8 - ArchivalUser - 05-26-2014
Following a circus accident, a man is unable to abduct his left arm from a 90 degree position to 180 degrees. Impairment of which of the following nerves could explain this finding?
a. Axillary nerve
b. Long thoracic nerve
c. Musculocutaneous nerve
d. Radial nerve
e. Thoracodorsal nerve
0 - ArchivalUser - 05-26-2014
b. Long thoracic nerve
0 - ArchivalUser - 05-26-2014
BB good question!
0 - ArchivalUser - 05-26-2014
b.
0 - ArchivalUser - 05-26-2014
AA
0 - ArchivalUser - 05-27-2014
AA.....
is serratus anterios muscle an abductor of arm......????long thoracic nerve.....
It (SA) stabilizes the medial border of scapula n holds scapula in place/.....lesion causes winging of scapula.....
0 - ArchivalUser - 05-27-2014
"B" is correct.
0 - ArchivalUser - 05-27-2014
??????????????
explanation plss....is SA an overhead abductor....?????????
0 - ArchivalUser - 05-27-2014
The long thoracic nerve innervates the serratus anterior muscle, which- among its other functions- upwardly rotates the scapula allowing the arms to reach a 180 degree position. The thoracodorsal nerve innervates the latissimus dorsi, which has no function in arm abduction. The axillary nerve innervates the deltoid, which abducts the arm to 90 degrees. The radial nerve innervates the posterior muscles of the arm and forearm, which are not involved in arm abduction. The musculocutaneous nerve innervates muscles of the anterior arm, which are not involved in arm abduction.
0 - ArchivalUser - 05-27-2014
thanks for the explanation fmg.....but..