CAPS 301 Lecture Notes - Lecture 17: Vestibular Nuclei, Frontal Lobe, Medial Lemniscus
15 Oct 2018
School
Course
Professor
Document Summary
Somatic (from the body) sensation is carried by peripheral nerve to the spinal cord. Information is passed rostrally (towards the head) through the cord and brainstem, through the thalamus and finally reaches the cerebral cortex. Simple rule is that there is a chain if 3 neurons between the peripheral sensory receptor and the cortex (2 synapses that happen) Has sensory receptor at its peripheral extremity. Has a sensitive ending that is sensitive to a specific type of energy. Cell body is in the dorsal root ganglion. Central branch enters the cns where is synapses. Crosses to the opposite side (crosses the midline) Where it synapses with 3rd order neuron. 3rd order neuron: (thalamocortical) projects to the somatosensory cortex in the parietal lobe. Somatosensory cortex: specific region in cerebral hemispheres (there is. **learn to draw this simplified one on each side) These modalities are carried from the periphery in groups i and ii (myelinated and fast)
