PSY 250 Lecture Notes - Lecture 7: Lamellar Corpuscle, Golgi'S Method, Medial Lemniscus

• School: Stony Brook University
• Department: Psychology
• Course: PSY 250
• Professor: Ryan Parsons

Document Summary

Practice questions: most sensory signals pass through this subcortical structure before reaching the primary sensory cortex. Somatosensory system: there are three subsystems, exteroceptive cutaneous system, mechanical stimulation, thermal stimulation, nociception, two major somatosensory pathways. Flow of somatosensory information: axons carrying sensory information from cutaneous receptors gather together (spinal nerves) > enter the dorsal roots of the spinal cord. >association cortical regions: primary somatosensory cortex (s1, postcentral gyrus (in the parietal cortex, posterior to the central sulcus, somatotopic organization. Different strips of s1 respond to different kinds of skin stimulation (parallel processing) Larger cerebral cortex representation for body parts with more receptors. Certain areas that respond to somatosensory information in you parietal and temporal lobe. Reduced ability to detect and discriminate by touch. Why: not damaging receptors, damage brain tissue, not likely you"re going to damage enough tissue to not feel stimulus.