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Nervous System Ch 14

Nervous system functions - Seeley Ch 14

Receptors that respond to extreme mechanical, chemical, or thermal stimuli. Pain Nociceptors
respond to changes in temperature Thermoreceptors
chemicals become attached to receptors on their membranes. Smell and taste Chemoreceptors
compression, bending, stretching of cells. Touch, pressure, proprioception, hearing, and balance Mechanoreceptors
Receptors associated with organs Visceroreceptors
Receptors that respond to pain, itch, tickle, temperature, joint movement and proprioception Free nerve endings
Receptors that respond to light touch and superficial pressure Merkel disk
Receptors that respond to light touch, very slight bending of hairs Hair follicle receptors
Receptors that respond to deep cutaneous pressure, vibration and propriception. Pacinian Corpuscle
Two Point Discrimination. Meissner Corpuscle
Receptors that respond to continuous touch or pressure, depression or stretch of skin Ruffini end organ
Detection of muscle stretch, important for muscle tone Muscle spindle
Detection of tendon stretch Golgi tendon organ
decreased sensitivity to a continued stimulus Accomodation
provide information about the precise position and the rate of movement of various body parts Proprioceptors
sensation of pain in one region of body that is not source of stimulus Referred Pain
System of motor nerve tracts that maintains muscle tone, controls speed and precision of skilled movements Pyramidal System (Direct Pathways)
System of motor nerve tracts that is involved with less precise movements and the initiation or change or movements (Parkinson's Disease) Extrapyramidal System (Indirect Pathways)
sensory speech- understanding what is heard and thinking of what one will say Wernicke's area
motor speech- sending messages to the appropriate muscles to actually make the sounds Broca's area
absent or defective speech or language comprehension. Caused by lesion somewhere in the auditory/speech pathway Aphasia
controls muscular activity in and receives sensory information from LEFT side of body Right Cerebral Cortex
Right: controls muscular activity in and receives sensory information from RIGHT side of body Left Cerebral Cortex
Sensory information of both hemispheres shared through commissures corpus callosum
very short-term retention of sensory input Sensory Memory
information retained for few seconds to minutes Short-term memory
explicit or declarative memory, retention of facts, accessed by the hippocampus and amygdala Long-term memory
memory associated with development of skills such as riding a bicycle, playing an instrument Implicit memory
series of neurons and their pattern of activity. Involved in long-term retention of information, a thought, or an idea. Memory Engram (memory trace)
System involved with emotions, mood and behavior as well as basic survival instincts Limbic Sytem
Created by: 599966851