We use lamina instead layer to decribe section of spinal cord.
Ten layers of grey matter (I–X), identified in the early 1950s by Bror Rexed to label portions of the grey columns of the spinal cord. Pretty similar to 6 layers in cortex, which are also identified by cellular morphlogies.
Posterior grey column: I–VI (1-6)
Information receive part. Lamina V and VI are mainly involved in processing sensory afferent stimuli from cutaneous, muscle and joint mechanical nociceptors as well as visceral nociceptors.
Anterior grey column: VIII–IX (7-8)
Information output part. Contains bascially motor interneurons. Note that neck and face are controlled by more cranial part (upper part, or called cervical, C1-C7), hand and arms are controlled by middle part (T1-T12), legs are S1-S5. In a word, locally controlled.
Lateral grey column: VII and X (9-10)
The most medial part, actually not really invovled in laminar.
Lamina VII: intermediomedial nucleus, intermediolateral nucleus, posterior thoracic nucleus in the thoracic and upper lumbar region[6]
Lamina X: an area of grey matter surrounding the central canal.[6][3]
