Divisions of Spinal Cord Gray Matter

Question 1

Substantia Gelatinosa

Answer 1

In DORSAL HORN, along ENTIRE CORD, modulates incoming pain

Question 2

Nucleus Proprius

Answer 2

in DORSAL HORN, along ENTIRE CORD.

Incoming sensory; esp. pain, temp and touch.

Fibers cross and form ascending tracts; LATERAL SPINTOTHALAMIC tract

Question 3

Nucleus Dorsalis

Answer 3

in DORSAL HORN (C8-L2), sensory for nonconcious proprioception.

Fibers give rise to DORSAL SPINOCEREBELLAR tract

Question 4

Medial Motor Cell Column

Answer 4

in VENTRAL HORN, along ENTIRE CORD.

LMN cell bodies that innervate trunk muscles.

Question 5

Lateral Motor Cell Column

Answer 5

in VENTRAL HORN

C5-T1: LMN cell bodies whose fibers exit to innervate UPPER EXTREMITY

L2-S3/S4: LMN cell bodies whose fibers innervate LOWER EXTERMITY

Question 6

Spinal Accessory Nucleus

Answer 6

in VENTRAL HORN (C1-C6): LMN cell bodies whose fibers exit the spinal cord to form the SPINAL ACCESSORY NERVE –> innervates TRAPS and STERNOCLEIDOMASTOID muscles

Question 7

Phrenic Nucleus

Answer 7

in VENTRAL HORN (C3, C4, C5) LMN cell bodies whose fibers form the motor component of the PHRENIC NERVE for innervation of DIAPHRAGM

Question 8

Intermediolateral Cell Column

Answer 8

in INTERMEDIATE ZONE (T1-L3): PREGANG. SYMP cell bodies who’s fibers exit spinal cord to synapse on ganglia, forms lateral horn in thoracic cord region.

Question 9

Sacral Parasympathetic Nucleus

Answer 9

in INTERMEDIATE ZONE (S2-S4): PREGANG. PARASYMP cell bodies who’s fibers exit spinal cord to synapse on ganglia, provides innervation to DESCENDING COLONG, SIGMOID COLON, and PELVIC VISCERA.