HUBS1403 Lecture Notes - Lecture 28: Neuromuscular Junction, Amyotrophic Lateral Sclerosis, Corticobulbar Tract
31 Jul 2018
School
Department
Course
Professor
Document Summary
Lecture 28: sensory nervous system: distinguish between general and special senses, sensory processing. Stimulation of sensory receptor: many different types of receptors. Transduction of the stimulus: converting a stimulus energy into an electrical signal. Transmission of sensory signal: generation of action potentials from site of stimuli to cns. Process of sensation: stimulation of the sensory receptor. An appropriate stimulus must occur within the sensory receptor"s receptive field, that is, the body region where stimulation activates the receptor and produces a response: transduction of the stimulus. A sensory receptor transduces (converts) energy in a stimulus into a graded potential. Recall that graded potentials vary in amplitude (size), depending on the strength of the stimulus that causes them, and are not propagated: generation of nerve impulses. When a graded potential in a sensory neuron reaches threshold, it triggers one or more nerve impulses, which then propagate toward the cns.
