SOMATOSENSORY SYSTEMS

Organization and Functional Roles

Dermatomes

Spinal cord- cross section

Dorsal column-Medial lemniscal system (DC-ML system)Fasciculus gracilis & Fasciculus cuneatus spatial orientation

Dorsal Column pathways; Fasciculus gracilis & Fasciculus cuneatus

Topographic organization of sensory pathways

Sensory Ataxia

Subacute combined degeneration of spinal cord (Vitamin B12 deficiency)

Treponema pallidum

Primary Syphilis (Chancre) on lips

Primary syphilis lesion (Chancre)on penis

Primary Syphilis

Chancre; Firm, round, small, Painless, appears at the spot where syphilis entered the body.

Rash accompanying secondary syphilis

Rash on palms accompanying secondary syphilis