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15 Cards in this Set

  • Front
  • Back

Sacral Spinal Cord

Less white matter, a lot of gray matter.

Fasciculus Gracilis

Conveys proprioception and fine tactile discrimination from the caudal half of the body. Made up of mostly primary afferent axons.

Substantia gelatinosa

A long nucleus found in the dorsal horn. Neuronal activity serves to modulate pain transmission.

Lumbar spinal cord

More white matter surrounding the gray matter.

Lateral Funiculus

The area of white matter between the dorsal lateral sulcus and the central lateral sulcus. Many ascending and descending pathways are located here.

Anterolateral system

Conveys pain and temperature. Called a system instead of a tract because axons have variety of targets in the brainstem and diecephalon.

Ventral funiculus

White matter between the ventral lateral sulcus and the ventral median sulcus. Contains mostly descending tracts projecting to lower motor neurons.

Lower motor neurons

Located in the ventral horn, these are the final cells through which the CNS can affect muscle contraction.

Anterior White Commissure

Contains myelinated axons crossing the midline.

Thoracic spinal cord

Much less grey matter, a lot more white matter.

Interomediolateral cell column

A long nucleus found in spinal cord T1-L2. The small neurons give rise to sympathetic preganglionic axons that exit ventral roots and end on periphery ganglia.

Nucleus Dorsalis (of Clarke)

Found in spinal cord T1-L2. Fairly large neurons have axons that join ipsilateral dorsal spinocerebellar tract.

Cervical Spinal Cord

Similar to thoracic, has a lot of white matter, but has 2 dorsal columns (fasciculus gracilis and fasciculus cuneatus.

Fasciculus cuneatus

Conveys proprioception and fine tactile discrimination from the upper thorax, upper extremity, and neck.

Dorsal intermediate sulcus

The sulcus marks the separation of the fasciculus gracilis and cuneatus. A longitudinal groove seen in cervical and thoracic spinal levels.