PSYC 367 Lecture Notes - Lecture 11: Medial Lemniscus, Brainstem, Ventral Posteromedial Nucleus
Document Summary
Identify 4 different types of mechanoreceptors in glabrous skin, and state their location, size of receptive field, adaptation rate, maximum feature sensitivity and primary function. Describe the response of warmth and cold thermoreceptors with respect to physiological zero. Describe the 3 types of nerve fibres coming from the skin in terms of relative diameter, myelination, conduction velocity, receptor endings, and sensation. List the main stations where synapses occur, and the connecting pathways, in the dorsal-column- medial-lemniscal pathway from the mechanoreceptors in the skin to the somatosensory cortex. Describe how somatosensory sensitivity, discrimination and acuity are typically measured, and how they vary across body site. Describe the relationship between the sensory homunculus, receptive field size and 2-point thresholds. Define and give an explanation for aristotle"s illusion and the failure of the illusion. Touch: sensations caused by mechanical displacements of the skin. Kinesthesis: part of proprioception; position and movement of limbs in space (+ internal sensations)
