PSY100H1 Lecture Notes - Lecture 7: Postcentral Gyrus, Cerebral Cortex, Ciliary Muscle
65
PSY100H1 Full Course Notes
Verified Note
65 documents
Document Summary
Mechanoreceptors: respond to mechanical distortion (ex. stretching) or pressure (touch: most sensitive mechanoreceptors are found in the cochlea. Connected parts of the body tend to be represented beside each other in the cerebral cortex. More sensitive regions tend to have more cortical areas dedicated to them (homunculus man) more sensitive areas, more cortical shape. Nerve signals enter thalamus which then travel to the primary sensory cortex in the parietal lobe: all experiences occur only in your brain. These are activated by damaging/possibly damaging stimuli (ex. being pierced, burned: myelinated ( a delta ) fibres: sharp, immediate pain (protection, lightly/non myelinated ( c ) fibres: dull, steady pain (recuperation) Gate control theory of pain: for pain to be experienced, pain receptors must be activated. And the neural gate in the spinal cord must allow the signals through the brain: if the gate is open pain is experienced, if the gate is closed pain is masked and not experienced.
