205textnotes12 - environment Special senses taste vision...

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2. Long term potentiation alters synaptic communication Within the CNS the neurotransmitter glutamate is associated with a phenomenon called potentiation. The use of a synapse increases the sensitivity of the post-synaptic cell and increases the neurotransmitter release from the pre-synaptic neuron (Figure 8-30) . This involves two post-synaptic receptors AMPA and NMDA. ---------------------------------------------------------------------- Chapter 10: SENSORY PHYSIOLOGY: A. General Properties of Sensory Systems ---------------------------------------------------------------------- Sensory systems (The Afferent Pathways) : Component of the nervous system, usually involving both Central and Peripheral Nervous Systems. Involves sensory receptors sending sensory information due to stimulation from some change in the internal or external
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Unformatted text preview: environment. Special senses : taste, vision, hearing, equilibrium, and smell. Somatic senses : touch-pressure, temperature, pain, and proprioception. General properties of sensory systems • External stimulus, • Sensory receptor, • Afferent sensory neuron, • Integration RECEPTORS: are transducers that convert stimuli into electrical signals. Receptors are structured to be sensitive to one type of stimulant (Fig. 10-1) • the simplest receptors are somatosensory (Figure 10-1a) • Receptors are divided into five major groups based on the type of stimulus (Table 10-2) 1.Chemoreceptors 2.Mechanoreceptors 3.Photoreceptors 4.Thermoreceptors 5.Nociceptors...
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