1.15.25 lecture: intro and organization of the nervous system

first order neuron is called a _________ because it's associated with the ________

nerve; peripheral nervous system

second order neuron is called a _________ because it's associated with the _________

tract; central nervous system

the corticospinal pathways involve _______ different pathways

2

the ______________ will synapse with an interneuron

upper motor neuron

the interneuron connects the upper motor neuron to the ____________

lower motor neuron

the ______________ is what leaves the spinal chord to innervate the muscle

lower motor neuron

loose sensory input, but keeping motor, what happened?

dorsal root injury

motor is always associated with the ______________

ventral root

all motor and sensory info lost from the point of injury and below, what happened

complete spinal chord injury

example of a upper motor neuron injury

losing everything but pain, what happened?

incomplete spinal chord injury

specifically, from the midline, laterally

ORGANIZATION OF THE NERVOUS SYSTEM

name the 3 basic functions of the nervous system

sensory input

integration

motor output

the basic nervous system function described by information gathered by sensory receptors about internal and external changes is called _________________

sensory input

the interpretation of sensory input is known as _____________________

integration

describe motor output

Activation of effector organs (muscles and glands) produces a response

name the 2 basic regions of the nervous system

central and peripheral

central consists of the ________ and __________

brain and spinal chord

true/false: the brain and spinal chord are 2 separate structures

FALSE, they're just different regions of the same thing

what is the Integrative and control center of the nervous system

the CNS (brain and spinal chord)

branching off of the brain and spinal chord is the _______________ which ___________________________

peripheral nervous system; communicates with peripheral structures

the PNS is broken down into 2 categories: _____________ and _______________

sensory and motor

The ________________ division of the ________________ is characterized by somatic and visceral sensory nerve fibers

sensory (afferent) division of the PNS

Afferent means ___________, so it's ________________

towards the CNS (Ascending), so it's sensory

The ________________ division of the ________________ is characterized by motor nerve fibers

motor (efferent) division of the PNS

efferent means ____________, so it's ________________

exit; motor

which division of the PNS conducts impulses from the receptors to the CNS?

sensory (afferent) division

which division of the PNS conducts impulses from the CNS to the effectors (muscles and glands)?

motor (efferent) division

what kind of sensory nerve fiber is associated with the skin?

somatic sensory nerve fiber

what kind of sensory nerve fiber is associated with an organ like the stomach?

visceral sensory nerve fiber

motor is divided into _____________ and ________________ divisions

somatic (voluntary) motor and autonomic (involuntary) motor

the ________________ nervous system is associated with voluntary motor control and conducts impulses from the CNS to the skeletal muscles

somatic nervous system

the ________________ nervous system is associated with involuntary motor control and conducts impulses from the CNS to the smooth muscles, cardiac muscles, and glands

autonomic nervous system

the _______________ is in charge of visceral motor control

autonomic nervous system

soma means _____________

body (Greek)

the autonomic nervous system controls ____________, ________________, and _______________

smooth muscles, cardiac muscles, and glands

autonomic is also called _______________ because of its association withorgans

visceral

autonomic is broken into __________________ and _____________

sympathetic (stress) and parasympathetic (rest)

Which division of the autonomic nervous system promotes housekeeping functions during rest?

parasympathetic division

Which division of the autonomic nervous system arouses the body and mobilizes its energy in stressful situations?

sympathetic division

Which division of the autonomic nervous system mobilizes the body systems during activity?

sympathetic division

true/false: sympathetic is excitatory and parasympathetic is inhibatory

FALSE

Which division of the autonomic nervous system conserves energy

parasympathetic