Final Exam LOs 7 + 8 Flashcards
Illustrate an overview of neural integration including sensory pathways, CNS processing pathways, and motor pathways
stimulus, depolarization of sensory receptor, action potential generation, propagation, and then CNS processing
Motor Pathways (CNS)
corticospinal pathway, medial pathway, and lateral pathway
Corticospinal pathway
motor pathway, in CNS, and deals with voluntary control over skeletal muscles (primary motor cortex)
Somatic Sensory Pathways (CNS)
carries sensory info from the skin + muscles + body wall (head, neck, and limbs) to the CNS
posterior column pathway
spinocerebellar pathway
spinothalamic pathway
Visceral Sensory Pathways
monitors visceral tissues + organs, primarily within the thoracic and abdominopelvic cavities
this is done through spinal nerves and cranialnerves, by interoceptors (nocireceptors etc.)
Receptor Specificity
each receptor has a characteristic sensitivity
Receptive Field
area is monitored by a single receptor cell
Receptor Potential
either graded depolarization or graded hyperpolarization, the stronger the stimulus, the larger the receptor potential
Generator Potential
a depolarizing receptor potential in a neural receptor
General Sensory Receptors
nociceptors: pain
thermoreceptors: temperature
chemoreceptors: chemical concentration
mechanoreceptors: physical distortion, tactile, baroreceptors, and proprioceptors
Spinothalamic Pathway
provides conscious sensations of crude touch, pressure, pain, and temperature
Posterior Column Pathway
carries conscious sensations, fine touch, pressure, and vibration
Spinocerebellar Pathway
Cerebellum receives proprioceptive info abt position of skeletal muscles, tendons, and joints
Somatic Nervous System (SNS)
controls contractions of skeletal muscles
Autonomic Nervous System (ANS)
controls visceral effectors, such as smooth muscle, cardiac muscle and glands
contains sympathetic + parasympathetic NS
Sympathetic Nervous System
think fight-or-flight
stimulation and release of norepinephrine and epinephrine which are NT for ADRENERGIC membrane receptors
Parasympathetic Nervous System
think rest-and-digest
all postganglionic neurons release ACh which is inactivated by AChE at synapse; the membrane receptors are nicotinic, and muscarnic