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Diagram showing possible connection of long descending fibers from higher centers with the motor cells of the ventral column through association fibers. ("Tectospinal fasciculus" labeled at center right.)
Latin t. tectospinalis
subject #185 760
Diagram of the principal fasciculi of the
spinal cord. ("Tectospinal fasciculus" labeled at center right, in red.)
tectospinal tract (also known as colliculospinal tract) is part of the indirect extrapyramidal tract and is responsible for coordinating head and eye movements.
It is responsible for impulses that are motor.
These impulses arise from one side of the midbrain to muscles on the opposite side of the
The portion of the midbrain from where this tract originates is the
superior colliculus, which receives afferents from the visual nuclei (primarily the oculomotor nuclei complex), then projects to the contralateral portion of the spinal cord.
The tract descends to the
cervical spinal cord to terminate in Rexed laminae VI, VII, and VIII to coordinate head, neck, and eye movements, primarily in response to visual stimuli.
External links Edit
epidural space, dura mater, subdural space, arachnoid mater, subarachnoid space, pia mater, denticulate ligaments, conus medullaris, cauda equina, filum terminale, cervical enlargement, lumbar enlargement, anterior median fissure, dorsal root, dorsal root ganglion, dorsal ramus, ventral root, ventral ramus, sympathetic trunk, gray ramus communicans, white ramus communicans
grey matter: central canal, substantia gelatinosa of Rolando, reticular formation, substantia gelatinosa centralis, interneuron, anterior horn, lateral horn, posterior horn ( column of Clarke, dorsal spinocerebellar tract)
white matter: anterior funiculus: descending ( anterior corticospinal tract, vestibulospinal fasciculus, tectospinal tract), ascending ( anterior spinothalamic tract, anterior proper fasciculus)
lateral funiculus: descending ( lateral corticospinal tract, rubrospinal tract, olivospinal tract), ascending dorsal spinocerebellar tract, ventral spinocerebellar tract, spinothalamic tract, lateral spinothalamic tract, anterior spinothalamic tract, spinotectal tract, posterolateral tract, lateral proper fasciculus, medial longitudinal fasciculus
posterior funiculus: fasciculus gracilis, fasciculus cuneatus, posterior proper fasciculus