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The depicts a cross-section of a typical spinal cord seg., combining some elements from different levels (e.g. the intermediolat. grey nucleus is only present from T1 to ± L1 or L2 where there're sympathetic (thoracolumbar outflow) nuclei).
it's schematically divided into asc. and desc. halves, h/e, in actuality, asc. and desc. paths coexist on both sides.
Spinal cord tracts
Transverse section through the spinal cord, composite representation, illustrating the principal ascending (left) and descending (right) pathways.
The lateral and ventral spinothalamic tracts ascend contralateral to the side of the body that is innervated.
C, cervical; D, distal; E, extensors; F, flexors; L, lumbar; P, proximal; S, sacral; T, thoracic.
Harrison’s™ Manual of Medicine: Nineteenth Edition
Important ascending and descending tracts in various funiculi
Posterior
Dorsal column–medial lemniscus tract (sensory: fine touch, proprioception)
Fasciculus gracilis (LE ipsilateral)
Fasciculus cuneatus (UE ipsilateral)
Intersegmental tracts
Fasciculus interfascicularis
Semilunar tract
Comma tract of Schultze
Septomarginal tract
Lateral
Posterior spinocerebellar (sensory: proprioception to cerebellum)
Anterior spinocerebellar (sensory: proprioception to cerebellum)
Lateral spinothalamic (sensory: pain and temperature contralateral)
Dorsolateral (Lissauer’s tract)
Lateral corticospinal (motor: skeletal muscle ipsilateral, UMN)
Rubrospinal (motor: cerebellum to skeletal muscle)
Lateral reticulospinal (pain gating, autonomic to motor neurons)
Olivospinal
Anterior
Anterior spinothalamic (sensory: pain and temperature contralateral)
Anterior corticospinal (motor: trunk skeletal muscle bilateral)
Vestibulospinal (sensory: vestibular, balance to motor neurons)
Lateral vestibulospinal
Medial vestibulospinal
Tectospinal (sensory: visual to cervical motor neurons)
Medial reticulospinal (pain gating, autonomic to motor neurons)
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