spinal tract

spi·nal tract

any one of a multitude of fiber bundles ascending or descending in the spinal cord.

spinal tract

any one of the ascending (sensory) and descending (motor) pathways for sensory or motor nerve impulses that is found in the white matter of the spinal cord. Twenty-one different tracts lie within the dorsal, ventral, and lateral funiculi of the white substance. Ascending tracts conduct impulses up the spinal cord to the brain; descending tracts conduct impulses down the cord from the brain. The four major ascending tracts are the lateral spinothalamic, the ventral spinothalamic, the fasciculi gracilis and cuneatus, and the spinocerebellar. The four major descending tracts are the lateral corticospinal, the ventral corticospinal, the lateral reticulospinal, and the medial reticulospinal. Touch, pressure, proprioception, temperature, and pain are sensory stimuli transmitted via the spinal tracts. Reflex and voluntary motor activity is regulated by motor nerve stimulation from the brain and brainstem to the motor neurons of the spinal cord.

spi·nal tract

(spīnăl trakt)
Any of a multitude of fiber bundles ascending or descending in the spinal cord.
References in periodicals archive ?
Those signals descend from the cortex to the spinal tract, speeding through the spine while jumping to other motor neurons that then excite muscle fibers.
Using this approach, we were able to verify whether forelimb motor function recovered on the injured side not only after damage to the cerebral cortex spinal tract, but also after injury to the cervical spinal cord via the route change of the corticospinal tract on the uninjured side.
The distribution of the pain conducting fibers within the anterolateral spinal tract consists of small, ventrally located fibers mainly conducting pain sensation.
Fifty-five (55%) of total cervical movement (most prominently rotation) is provided by the atlanto-axial joint (C1-C2), which houses the trigeminal spinal tract subnucleus and C1-C2 dorsal horns.
Such a mechanism could also be used to explain a TMJ dysfunction brought on by swimming via relay through the previously mentioned trigeminal spinal tract subnucleus and C1-C2 dorsal horn transitional zone.
With our well-advanced clinical programs in Parkinson's/ADHD diagnostics, our well-recognized anti-angiogenesis agent, Troponin, and groundbreaking work in axonal regeneration in the spinal tract as well as our research collaboration in allergy and asthma with Pfizer, Boston Life Sciences is looking forward to a very productive year in 2000.
IMAGING FINDINGS: Axial T2 FLAIR image reveals a symmetric hyperintensity involving the central pontine region, sparing the tegmentum and cortico spinal tracts resulting in a characteristic Mexican hat or bat wing configuration of hyperintensity.
Figure 1: Axial T2 FLAIR image demonstrates a symmetric hyperintensity involving the central pontine region, sparing the tegmentum and cortico spinal tracts resulting in a characteristic Mexican hat or bat wing configuration of hyperintensity.
These spinal tracts transmit information between the brain and body.
Collectively, these animal studies indicate some spinal tracts undergo a fair amount of spontaneous sprouting, providing new neuronal pathways that could be targeted for increasing growth, regeneration, and functional recovery of movements and sensations.