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Unformatted text preview: has a central area of gray matter that is surrounded by white matter. The white matter consists of bundles of myelinated axons and are organized into specific ascending or descending tracts. At regular intervals, spinal nerves enter or exit the spinal cord through the intervertebral foramina. Spinal nerves have dorsal and ventral roots with the dorsal root carrying sensory information into the spinal cord and the ventral root carrying motor information out towards the periphery. Spinal Reflex There are several types of reflexes that are mediated by the spinal cord. In general, a reflex consists of a sensory neuron entering the spinal cord, an interneuron integrating sensory information, and the stimulation of the motor neuron, causing a response. Reflexes are important because they result in a quicker reaction time to sensory stimuli....
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- Fall '10