abducens nerve sixth cranial nerve; responsible for contraction of one of the extraocular muscles
alar plate developmental region of the spinal cord that gives rise to the posterior horn of the
gray matter
amygdala nucleus deep in the temporal lobe of the cerebrum that is related to memory and
emotional behavior
anterior column white matter between the anterior horns of the spinal cord composed of many
different groups of axons of both ascending and descending tracts
anterior horn gray matter of the spinal cord containing multipolar motor neurons, sometimes
referred to as the ventral horn
anterior median fissure deep midline feature of the anterior spinal cord, marking the separation between the
right and left sides of the cord
anterior spinal artery blood vessel from the merged branches of the vertebral arteries that runs along the
anterior surface of the spinal cord
arachnoid granulation outpocket of the arachnoid membrane into the dural sinuses that allows for
reabsorption of CSF into the blood
arachnoid mater middle layer of the meninges named for the spider-web-like trabeculae that extend
between it and the pia mater
arachnoid trabeculae filaments between the arachnoid and pia mater within the subarachnoid space
ascending tract central nervous system fibers carrying sensory information from the spinal cord or
periphery to the brain
axillary nerve systemic nerve of the arm that arises from the brachial plexus
basal forebrain nuclei of the cerebrum related to modulation of sensory stimuli and attention
through broad projections to the cerebral cortex, loss of which is related to
Alzheimer's disease
basal nuclei nuclei of the cerebrum (with a few components in the upper brain stem and
diencephalon) that are responsible for assessing cortical movement commands and
comparing them with the general state of the individual through broad modulatory
activity of dopamine neurons; largely related to motor functions, as evidenced
through the symptoms of Parkinson's and Huntington's diseases
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basal plate developmental region of the spinal cord that gives rise to the lateral and anterior
horns of gray matter
basilar artery blood vessel from the merged vertebral arteries that runs along the dorsal surface of
the brain stem
brachial plexus nerve plexus associated with the lower cervical spinal nerves and first thoracic
spinal nerve
brain stem region of the adult brain that includes the midbrain, pons, and medulla oblongata
and develops from the mesencephalon, metencephalon, and myelencephalon of
the embryonic brain
Broca's area region of the frontal lobe associated with the motor commands necessary for
speech production and located only in the cerebral hemisphere responsible for
language production, which is the left side in approximately 95 percent of the
population
Brodmann's areas mapping of regions of the cerebral cortex based on microscopic anatomy that
relates specific areas to functional differences, as described by Brodmann in the
early 1900s
carotid canal opening in the temporal bone through which the internal carotid artery enters the
cranium
cauda equina bundle of spinal nerve roots that descend from the lower spinal cord below the first
lumbar vertebra and lie within the vertebral cavity; has the appearance of a horse's
tail
caudate nucleus deep in the cerebrum that is part of the basal nuclei; along with the
putamen, it is part of the striatum
central canal hollow space within the spinal cord that is the remnant of the center of the neural
tube
central sulcus surface landmark of the cerebral cortex that marks the boundary between the frontal
and parietal lobes
cephalic flexure curve in midbrain of the embryo that positions the forebrain ventrally
cerebellum region of the adult brain connected primarily to the pons that developed from the
metencephalon (along with the pons) and is largely responsible for comparing
information from the cerebrum with sensory feedback from the periphery through
the spinal cord
cerebral aqueduct connection of the ventricular system between the third and fourth ventricles located
in the midbrain
cerebral cortex outer gray matter covering the forebrain, marked by wrinkles and folds known as
gyri and sulci
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