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GC chapter 15

Somatic Nervous system

3 components of the Afferent division of the nervous system Receptors, sensory neurons, sensory pathways
3 components of the Efferent division of the nervous system nuclei, motor tracts, motor neurons
Specialized cells that monitor specific conditions Sensory receptors
what is the language of the nervous system action potentials
peripheral afferents in the sensory pathway nerves
ganglion in the sensory pathway nuclei
axons to higher centers in the sensory pathway tracts
higher centers in the somatic motor pathway motor nuclei
efferent axons in the somatic motor pathway tracts
type of nerves serving the somatic motor pathway peripheral
Temperature, pain, proprioception, touch, pressure, vibration general senses
olfaction, vision, gustation, equilibrium, hearing special senses
arriving information of the general senses sensation
conscious awareness of a sensation Perception
area monitored by a single receptive cell receptive field
the reduction in sensitivity to a constant/painless stimulus adaptation
receptors that are always active, slow adapting, remind you of an injury long after the initial damage tonic receptor
receptors that are inactive until a change occurs,fast adapting phasic receptor
receptors that are stimulated extreme temperature changes, mechanical damage, dissolved chemicals from injured cells nociceptors
receptors that are stimulated by temperature sensations, thermoreceptors
receptors that are stimulated by physical distortion, mechanoreceptors
receptors that are stimulated by changes in chemical concentrations chemoreceptors
receptors found in the skin, in joint capsules, periostea and walls of blood vessels nociceptors
receptor that provides info about touch vibration and pressure Tactile receptors
Detects pressure changes in tubes of the body Baroreceptors
type of mechanoreceptor that monitors positions of joints and muscles Proprioceptors
receptors that have small receptive fields, and provide detailed info about the stimulus Fine touch/ pressure receptors
receptors that have large receptive fields, poor localization and provide little information about the stimulus Crude touch/pressure receptors
tactile receptors in epidermis, tonic/small receptive fields, sensitive to touch/pressure Free nerve ending
tactile receptor that uses hair to detect stimulus Root hair plexus
fine touch/pressure receptors in the skin that do not adapt and have small receptive fields Tactile discs/merkel cells
fine touch receptors found in eyelids, lips fingertips, external genatailia, nipples, fine touch/pressure/low freq vibration, adapt within 1 second after contact Tactile Corpuscles/Meisseners corpuscle
Tactile receptor that is sensitive to deep pressure, fast adapting, most sensitive to pulsing/high intensity vibration Lamellated Corpusles/Pacinian corpuscle
tactile corpuscles in the reticular dermis, tonic/little adaptation, sensitive to pressure/distortion of the skin Ruffini Corpuscles
sensory neuron in the dorsal root ganglion/cranial nerve ganglion First order neuron
interneuron in the cns that synapses on the sensory neuron Second order neuron
sensory neuron in the thalamus that synapes on the interneuron in the cns to bring the stimulus to our awareness Third order neuron
nerves that carry general senses from the mouth, palate, pharynx, larynx, trachea, esophagus, to the brain/brainstem mixed cranial nerves
large nucleus in the Medulla oblongata that processes visceral sensory info Solitary nucleus
innervates a single motor unit, inhibits or facilitates lower motor neuron Upper motor neuron
motor neuron in the brain/spinal cord that triggers a contraction in innervated muscle Lower motor neuron
provide background patterns of movement involved in motor activities Basal nuclei
condition caused by lack of oxygen in developing tissues of the cerebellum, basal ganglia, thalamus, cortex cerebral palsy
defect in upper/lower neuron axons, causing atrophy of skeletal muscle Amytrophic lateral sclerosis
pathway of crude touch/pressure sensations to the brain Anterior spinothalamic tract
pathway of pain/temperature to the brain Lateral spinothalamic tract
pathway of fine touch/vibration/pressure/proprioception to the brain faciculus gracilis/faciculus cuneatus via the posterior column pathway
pathway of propriocetive input from the 3 types of proprioceptorson Right side Anterior spinocerebellar tract
pathway of prorioceptive input from the 3 types of proprioceptors on the Left side Posterior Spinocerebellar tract
Created by: 100000860991270