Neuroanatomy Draw It To Know It

7. Spinal Cord 117

Ventral commissure

Peripheral

Nerve

Posterior

column

Gracile &

cuneate nuclei

Anterolateral

system fiber

Lateral

corticospinal

tract

Motor

neuron

Internal arcuate fasciculus

(1PCP)

(2PCP)

(1CST)

Primary sensory cortex

Corticospinal tract

Medial

lemniscus

Thalamus

(2ALS)

(2CST)

Cervico-medullary junction

Primary motor cortex

Anterolateral

system

(1ALS)

Posterior column pathway - PCP

Anterolateral system - ALS

Lateral corticospinal tract - CST

(3 PCP)(3ALS)

Posterior column fiber

(Right)

(Left)

Axon

Posterior

nerve root

Anterior

nerve root

Spinal

nerve

DRAWING 7-4 Major Ascending & Descending Tracts