49- The white matter of the spinal cord contains bundles of axons that share common origins destinations and functions, they are called tracts_____________.
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The white matter of the spinal cord is composed of ascending and descending fibre tracts. These are arranged into six columns of white matter called funiculi.
The fibre tracts within the white matter of the spinal cord are named to indicate whether they are ascending (sensory) or descending (motor) tracts. The names of the ascending tracts usually start with the prefix spino- and end with the name of the brain region where the spinal cord fibres first synapse. The anterior spinothalamic tract, for example, carries impulses conveying the sense of touch and pressure, and synapses in the thalamus. From there it is relayed to the cerebral cortex, The names of descending motor tracts, conversely, begin with a prefix denoting the brain region that gives rise to the fibres and end with the suffix -spinal. The lateral corticospinal tracts, for example, begin in the cerebral cortex and descend the spinal cord.
The fibre tracts within the white matter of the spinal cord are named to indicate whether they are ascending (sensory) or descending (motor) tracts. The names of the ascending tracts usually start with the prefix spino- and end with the name of the brain region where the spinal cord fibres first synapse. The anterior spinothalamic tract, for example, carries impulses conveying the sense of touch and pressure, and synapses in the thalamus. From there it is relayed to the cerebral cortex, The names of descending motor tracts, conversely, begin with a prefix denoting the brain region that gives rise to the fibres and end with the suffix -spinal. The lateral corticospinal tracts, for example, begin in the cerebral cortex and descend the spinal cord.