introduction of Neurophsiology Flashcards
What is the function of sensory receptors?
sensory receptors detect internal or external stimuli. The sensory information is carried to the CNS through cranial and spinal nerves.
Integrative function
process sensory information by analyzing it and making decision for appropriate responses.
Motor function
activation of effectors (muscles and glands) through cranial and spinal nerves.
sensory neurons of Somatic nervous system
convey information from somatic receptors (in the in the head, body wall and limbs)and from receptors of special senses: vision, hearing and taste to the CNS.
motor neurons of Somatic nervous system
conduct impulses from CNS to skeletal muscles only. It is the voluntary part of PNS because the motor response can be consciously controlled.
sensory neurons of Autonomic nervous system
convey information from autonomic sensory receptors (located mainly in the visceral organs) to the CNS.
motor neurons of Autonomic nervous system
conduct impulses from CNS to smooth muscles, cardiac muscles and glands. because the motor responses are not normally under conscious control, its action is involuntary.
The motor part is divided into sympathetic and parasympathetic divisions.
Sensory neurons of Enteric nervous system
monitor chemical changes within the GI tract or stretching of its walls.
Motor neurons of Enteric nervous system
control the contraction of GI smooth muscles , the secretions of GI organs, and the activities of GI endocrine cells. It is called the brain of the gut. It is involuntary. Many of ENS neurons function independent of ANS or CNS, although they also communicate with the CNS via sympathetic and parasympathetic neurons.
white matter
The widespread collection of axons in the CNS
tract
A bundle of axons in the CNS
nerve
A bundle of axons in the PNS
gray matter
A widespread collection of neuronal cell bodies
nucleus
A cluster of neuronal cell bodies in the CNS
ganglion
A cluster of neuronal cell bodies in the PNS
