Physiology 3120 Lecture Notes - Lecture 14: Evoked Potential, Triceps Brachii Muscle, Receptive Field

• School: Western University
• Department: Physiology
• Course: Physiology 3120
• Professor: Tom Stavraky

Document Summary

Peripheral receptors deconstruct environmental energy in the somatosensory system: outside world turns into aps that are propagated to the cns. Aps are interpreted by the cns to make a representation of the outside world. Reconstruction of stimuli: done by the cerebral cortex: cerebral cortex is the outside coating of the brain. Reconstruction does not start at the somatosensory cortex: there are other neurons along the somatosensory pathway (synapses, exchange of information at the brain stem and thalamus before the cortex, somatosensory cortex is part of the cerebral cortex. Somatosensory cortex is not the first place where reconstruction occurs: reconstruction occurs at the levels of the brainstem, spinal cord, etc, to report things about how things feel, the somatosensory cortex is important. Different receptors deconstruct an enviro. stimulus into specific information channels, which are sent to the cerebral cortex via the dorsal column-medial lemniscal system. In the somatosensory cortex, this information is processed and begins to be reconstructed.