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The outer tracts are more wedge shaped and were given

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Unformatted text preview: Spinal Ascending Tracts Carries info from skin, joints and muscles concerning discriminative touch, Carries tive pressure, vibration and body position pressure, Fasciculus cuneatus Fasciculus The cuneate fasciculus iis carrying information from the upper half of the body (T6 s cuneate from the upper limb and chest). Fasciculus gracilis Fasciculus carrying all of the information from the lower half of the body (T6, midthoracic and arrying information lower half midthoracic and below) fasciculus cuneatus fasciculus gracilis Spinal Cord Tracts Spinal Ascending Tracts Ascending Spinothalamic Spinothalamic Ascending afferent sensory fiber tract Ascending Info regarding pain, temperature and crude touch Info Spinocerebellar Spinocerebellar Afferent sensory tract Afferent Carries info regarding movement and limb position Carries spinocerebellar spinothalamic spinothalamic Somatotopic Oganization Somatotopic There is a somatotopic somatotopic representation of the body in the representation dorsal columns (fasciculus gracilis dorsal and fasciculus cuneatus). and fasciculus ). Caudal (sacral and lumbar) body parts are represented medially Rostral segments (upper thoracic Rostral segments and cervical) are represented laterally. Nucleus gracilis receives its input gracilis receives from about T7 and downward, While nucleus cuneatus receives its cuneatus receives input from spinal levels above T7 The Role of the Thalamus in Sensory Processing The Brain region that serves as a switching center for all sensory center for signals passing from the brain stem to other brain regions other brain EXCEPT SMELL. There are 2 thalami, and they are located on either side of the ocated ither 3rd ventricle. Contains many nuclei but 3 are but important for sensory processing the ventral posterior medial (VPM) and lateral nuclei (VPL) (VPL) the lateral geniculate geniculate nucleus nuc the medial geniculate geniculate nucelus. Movement and Its Central Control Movement Neural circuits responsible for the control Neural of movement can be divided into four distinct but highly interactive subsystems...
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