Peripheral
What is the Peripheral Nervous System?
Consists of all of the nerves of the body outside of the brain and spinal cord
What is the central nervous system?
composed of the brain and spinal cord; site of information processing
What is the function of a neuron?
It works to produce stimuli
What are the 4 lobes in a cerebral cortex?
Frontal, Parietal, Temporal, Occipital
Where does the spinal chord extend from?
Brain to near or into the tail
From the CNS, instructions travel to muscles and glands via
Efferent neurons
What are the two different regions of the central nervous system found in both the brain and spinal cord?
Gray and white matter
What does the tail of the neuron called?
An axon
What are the two main regions of a forebrain?
Telencephalon (cerebrum) and Diencephalon
How many pairs of spinal nerves down the length of a spinal chord?
31
Sensory information reaches CNS via...
Afferent Neurons
What is primarily composed of neuron cell bodies?
Gray Matter
A presynaptic cell releases what to the postsynaptic cell?
Neurotransmitters
Prime processing center for sensory information:
Thalamus
What emerges from gray matter in each vertebra of spine?
Two dorsal roots and two ventral roots
Where does the PNS transmits information to and from?
The Central Nervous System
What mostly made of axons wrapped in myelin?
White Matter
What channels open during an Action Potential?
NA+
What is the brain stem made up of?
Medulla Oblongata, Midbrain, Pons
What does the dorsal and ventral root each contain?
Dorsal is afferent sensory axons and Ventral is efferent sensory axons
What are the two types of PNS and what are their functions?
Somatic: Receives sensory input and targets skeletal muscle; Autonomic: Has two divisions that act antagonistically to control the body’s involuntary muscles and gland, sympathetic and parasympathetic
What are dermatomes?
Areas of skin that are connected to specific spinal nerves
What are the three types of neurons?
Afferent, Efferent, Interneurons
What is the major control center of the autonomic nervous system and the link between the nervous and endocrine systems?
Hypothalamus
What creates the spinal nerve?
Combination of dorsal and ventral roots