Nervous System Test Flashcards
Nucleus
Cell body inside of a neuron
Neuron
Basic structural unit of the nervous system
Dendrites
Nerve fibers that carry impulses toward the cell body
Axon
A single nerve fiber that carries impulses away from the cell body
Myelin sheath
A lipid covering that increases the rate of transmission
Synapse
Spaces between neurons
Ventricles
Hello spaces that connect with each other
Brain
Protected by membrane and skull
Cerebrum
Largest/highest section of the brain responsible for reasoning, memory, judgment
Cerebellum
Below back of cerebrum responsible for muscle coordination and balance
Diencephalon
Located between cerebrum and midbrain
Thalamus
Recognizes pain and temperature
Hypothalamus
Responsible for anger, fear, pain, affection
Midbrain
Also known as the brainstem and responsible for Eye and auditory reflexes
Pons
Below midbrain in brainstem and responsible for respiration
Medulla oblongata
Lowest part of the brainstem and responsible for swallowing and coughing
Spinal cord
Continues from and ends at first or second lumbar
Three layers of the meninges
Dura matter, arachnoid membrane, Pia matter
Function of the meninges
Cover and protect the brain and spinal cord
Two functions of cerebrospinal fluid
Circulates continually between the ventricles and through the subarachnoid
Peripheral nervous system
Consists of the somatic nervous system and the autonomic nervous system
Somatic nervous system
Consists of 12 pairs of cranial nerves and 31 pairs of spinal nerves
Homeostasis
Balanced state
Paraplegia
Paralysis and then lower extremity/lower part of the body caused by spinal cord injury
Encephalitis
Inflammation of the brain caused by a virus
Hydrocephalus
Excessive accumulation of cerebrospinal fluid