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.)
Diagram of the principal fasciculi of the spinal cord. ("Tectospinal fasciculus" labeled at center right, in red.)
Details
Identifiers
Latin
tractus tectospinalis
MeSH
D065844
NeuroLex ID
birnlex_759
TA98
A14.1.02.211 A14.1.04.112
TA2
6119
FMA
72620
Anatomical terminology
[edit on Wikidata]
In humans, the tectospinal tract (or colliculospinal tract) is a nerve tract that coordinates head and eye movements. This tract is part of the extrapyramidal system and connects the midbrain tectum, and cervical regions of the spinal cord.[1]
It is responsible for motor impulses that arise from one side of the midbrain to muscles on the opposite side of the body (contralateral). The function of the tectospinal tract is to mediate reflex postural movements of the head in response to visual and auditory stimuli.
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 (decussating dorsal to the mesencephalic duct) and ipsilateral portion of the first cervical neuromeres of the spinal cord, the oculomotor and trochlear nuclei in the midbrain and the abducens nucleus in the caudal portion of the pons.
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.
^Pocock, Gillian; Richards, Christopher D. (2006). Human physiology : the basis of medicine (3rd ed.). Oxford: Oxford University Press. p. 152. ISBN 978-0-19-856878-0.
In humans, the tectospinaltract (or colliculospinal tract) is a nerve tract that coordinates head and eye movements. This tract is part of the extrapyramidal...
vestibulospinal tract, the tectospinaltract and the reticulospinal tract. The rubrospinal tract descends with the lateral corticospinal tract, and the remaining...
along with other extra-pyramidal tracts including the vestibulospinal, tectospinal, and reticulospinal tracts. The tract is responsible for large muscle...
vestibulospinal tract, as well as tectospinal and reticulospinal tracts are examples of components of the medial pathway. The vestibulospinal tract is part of...
remain ipsilateral), and are involved with saccadic eye movements. The tectospinaltract connects the superior colliculi to the cervical nerves of the neck...
ventro-medial from the spinal tract of the trigeminal; the fibers come to lie in the medial portion of the lateral lemniscus. Tectospinaltract This article incorporates...
optokinetic reflex. It also carries the descending tectospinaltract and medial vestibulospinal tracts into the cervical spinal cord, and innervates some...
(intersect) within the lower medulla oblongata to form the lateral corticospinal tract on each side of the spinal cord. The fibers that do not decussate will pass...
tract is so named because it connects the cerebral cortex to cranial nerve nuclei. (The corticonuclear tract is also called the corticobulbar tract,...
when submitted to the processes of osmic acid. Marchi tract: Synonym for the tectospinaltract. Nota preventiva sulla fina anatomia dei corpi striati...
functionally into two major pathways: pyramidal tracts, which originate in the motor cortex, and extrapyramidal tracts, which originate in the brainstem (see schematic)...
described the dorsal tegmental decussation of the left and right tectospinal and tectobulbar tracts, located in the mesencephalon (midbrain). This was to become...
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