CAS BI 315 Lecture Notes - Lecture 11: Muscle Spindle, Sensory Neuron, Proprioception
Document Summary
Different neurotransmitters are associated with somatic and parasympathetic and sympat. Rate/frequency coding information can be conveyed by how fast a neuron is firing. Temporal coding information can be conveyed by when a neuron is firing. Sensory receptors respond to stimuli with specific qualities, which define their receptive fi. Peripheral receptive field sizes ultimately define sensory resolution. Massive costs of having a lot of neurons=waste of energy and space. Better sensory discriminations means more neurons will be needed. At higher level sensory systems tend to represent sensory information in an orderly topog. Somatotropin maps in primary somatosensory and motor cortex. High sensory resolution is linked to expanded representation in the cns. Ex- in the dentist when they numb is it harder to talk b/c you don"t have soma. Receptors densely packed, small receptive fields ascending projections conver. Receptors sparsely packed, large receptor fields, ascending projections. Body sensations- somatosensation( body"s physical interactions with itself and the environ.
