Slide 1

Dorsal Column-Medial Lemniscal System

Anterolateral System

Perspective:

Dorsal column-medial lemniscal system: Mechanical sensations

Anterolateral system:
Pain, Thermal, Itch

Nociceptors, thermoreceptors, & itch receptors are
bare nerve endings

Mechano-
receptor
receptive
fields

Fiber Histogram: Sensory axon innervating the skin

Dermatomes

Dermatomes
overlap

Spinal cords

Slide 13

Slide 14

Spinal Hemisection

Syringomyelia

Somatotopy of spinal paths

Anterolateral
system

1° Somatic Sensory Cortex Output Systems

Cortical Pain Representations

Summary