T1 Neurologic Level


- Anatomy:
    - C-8 & T-1 anterior nerve roots convey preganglionic sympathetic fibers for innervation of head & neck
           to corresponding spinal nerves, from which they pass to ganglionated sympathetic chain;
    - further laterally these 2 spinal nerves acquire bulk of postganglionic fibers for the hand and arm;
    - injury of C-8 & T-1 nerve roots does not affect sympathetic innervation of arm but interrupts those to same side of head
           causing vasodilatation, anhydrosis, & dilated pupil (Horner's syndrome)



Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Monday, December 12, 2011 1:58 pm