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Spinal Cord
tracts,funiculi,etc
29
Anatomy
Graduate
12/07/2009

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Cards

Term
Lamina I & V
Definition
receive nociceptive input. Unmyelinated, small diameter afferents
Term
Lamina III & IV
Definition
receive non-noxious input via myelinated, large diameter afferents
Term
Lamina II
Definition
receives input from nociceptive afferents (C fibers) & collaterals from large diameter afferents. Site of 1st order sensory processing
Term
Lamina VI
Definition
(base of dorsal horn) recieves input from descending motor and proprioceptive input from the periphery
Term
Lamina VII
Definition
Clarke's Column (C8-L3) Afferent muscle spindles, tactile & pressure receptors-ipsilateral cerebellum (does not cross)
Term
Ventral Horn
Definition
Involved in reflex patterns/MOTOR
Term
Lamina IX
Definition
ventral--Somatotopically organized MOTOR
Term
Somatotopically organization for Lamina IX
Definition
Flexor-dorsal, Extensor-ventral, trunk-medially, limbs-laterally
Term
Lateral Corticospinal tract
Definition
Dorsolateral-Volitional Motor to ipsi limbs extremities. does cross but at cuadal M.O.
Term
Anterolateral System
Definition
Ascending-& motor(reflex only) Crude touch. Crosses right away.
Term
Ventral Funiculus
Definition
Motor pathways from cerebral cortex & brainstem--AXIAL & NECK MUSCLES
Term
Dorsal Column Medial Leminiscal
Definition
Vibration, discriminate touch-sensory crosses in pyramid area
Term
Spinocerbellar tracts
Definition
Unconscious proprioceptive from limbs-sensory. Goes to cerebellum where it coordinates the movements then on to the cerebral cortex
Term
Rubrospinal descending
Definition
MOTOR Brainstem Flexor muscles Arms & forearms
Term
Reticulospinal ascending
Definition
MOTOR posture,gait, AXIAL body, Extensor
Term
Vestibulospinal descending
Definition
MOTOR -reflex, balance, connected to inner ear ARMS Extensor
Term
Caudal end of spinal cord
Definition
L1-L2
Term
Tapered caudal end
Definition
conus medullaris
Term
Dorsal column leison
Definition
unsteady, high stepping gait
Term
Gamma motor neurons found in Rexed lamina
Definition
IX
Term
Caudal end of Spinal cord in baby
Definition
L3
Term
Denticulate ligaments
Definition
fibrous bands of pia found on each side of SC between ventral and dorsal spinal roots usually 21 on each side.
Term
filum terminal internum
Definition
thin thread of pia matter that arises from conus medullaris
Term
Ventral Horn largest in
Definition
cervical and lumbar spinal cord
Term
vago vagal reflex
Definition
helps to control secretion of the stomach and senses of fullness or hunger.. (X)
Term
neuroglial in the PNS
Definition
Schwann
Term
neuroglial in the CNS
Definition
atrocytes,microglial, oligodendrocytes, ependymal cells***endothelial are not considered neuroglial
Term
Primary Sensory neurons
Definition
dorsal root ganglion have single process that divides w/ no clear dendrite/axon distinction
Term
Receptor zone
Definition
dendrites & cell body--graded potentials
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