The Brain and Spinal Cord Flashcards
3 main divisions of brain
cerebrum
cerebellum
brainstem
white matter (composed of, function)
composed of nerve axons (covered with myelin)
axons carry nerve impulses between the neurons
grey matter (composed of, function)
composed of nerve cell bodies (unmyelinated)
nerve cell bodies are control centers
route sensory and motor stimuli and create a response
axons carry _____ _____ between the neurons
nerve impulses
nerve cell bodies are ____ _____; route ___ and ___ stimulu and create a response
control centers
sensory
motor
cerebrum
largest part
divided into R/L hemisphere
consist of both grey matter and white matter
the cerebrum hemispheres are connected in the midline by a structure called the
corpus callosum
the cerebral hemispheres are separated from one another from one another by the
falx cerebri
each cerebral hemispheres can be further subdivided into ___ lobes
4
cerebral gray matter (consists of what and location)
the cortex (outer layer) and basal nuclei (located deep in the midline)
cerebral white matter lies deep to the ______
cortex
the 4 lobes of each cerebral hemisphere correspond to the adjacent ______
cranial bone
gyri
small folds in the cerebrum
sulci
shallow grooves in the cerebrum
fissures
deep grooves in the cerebrum
what are the two fissures in the cerebrum
longitudinal (separates hemisphere)
lateral (Sylvian) (separates temporal froom frotnal and parietal)
corpus callosum (what, location, function, forms)
bundle of white matter located in the midline
connection between the R/L hemispheres
forms the roof of the lateral ventricles
parts of the corpus callosum
rostrum (think uncinate as a long word)
genu (think head as 4 letters)
body
splenium (like spleen as pancreas tail points to spleen)
everything correlates to the pancreas for shape/names
basal nuclei aka
ganglia
basal nuclei/ganglia (what/location/function/adjacent to)
distinct regions of grey matter deep within cerebral white matter
relay stations for sensory stimuli
adjacent to lat ventricles
what are the two basal nuclei/ganglia
caudate nucleus
lentiform nucleus
what are the two parts of the lentiform nucleus
putamen
globus pallidus
thalamus
ovoid masses of grey matter (R/L)
at the base of the cerebral hemispheres
relay stations for nerve impulses
R/L thalami are located on either side of the third ventricle
basal nuclei/ganglia are relay stations for ______ stimuli
sensory
basal nuclei/ganglia are adjacent to the ______
lateral ventricles
basal nuclei/ganglia are distinct regions of ________ deep within the cerebral ______
grey matter
white matter
the thalamus are ____ masses of ____ matter
ovoid
gray
the thalamus is located at the ____ of the cerebral hemispheres and the R/L thalami are located on either side of the ______
base
3rd ventricle
the thalamus forms the ____ walls of the 3rd ventricle
lateral
massa intermedia
tissue bridge between R/L thalamus
passes through the 3rd ventricle in the midline
the brainstem connects the ___ and the ____
brain
spinal cord
brainstem controls
vitals functions such as breathing and HR
major parts of the brainstem (3)
midbrain
pons
medulla oblongata (medulla)
the forebrain AKA; hindbrain AKA
cerebrum
cerbellum
midbrain (what/size/location/surrounds)
superior/smallest portion of brainstem
located superior to the pons
surrounds the cerebral aqueduct
the cerebral aqueduct is a connection between the ____ and ____ and is surrounded by the _____
3rd and 4th ventricles
midbrain
pons (what/location)
prominent anterior bulge of the brainstem
between midbrain and medulla
what is the bridge between the cerebrum and cerebellum
pons
what does the pons form
the anterior wall of the 4th ventricle
what forms the anterior wall of the 4th ventricle
pons
what does the pons control
controls involuntary functions (sleep, hearing, balance)
medulla oblongata (what part of brainstem, extends from, continuous with)
inferior portion of the brainstem
extend from pons to the foramen magnum
continuous with the spinal cord
the medulla oblongata extends from the ___ to the _____
pons
foramen magnum
foramen magnum
hole at the base of the skull
what does the medulla oblongata regulate
vital functions like HR/respiratory rhythm/blood pressure/breathing
cerebellum has how many hemispheres
two (R/L)
the cerebellum sits posterior to the ____ and _____
pons
medulla oblongata
the cerebellum sits _____ to the pons and medulla oblongata
posterior
the cerebellum is the center for ____ functions
motor
tentorium cerebelli
separates the cerebrum from cerebellum
what separates the cerebrum from the cerebellum
the tentorium cerebelli
parts of cerebellum (2)
vermis
cerebellar peduncles
vermis (part of what, location, connects)
part of the cerebellum
midline structure
connects the 2 hemispheres of the cerebellum
what connects the 2 hemispheres of the cerebellum
vermis
cerebellar peduncles (part of, how many, connect, locations)
part of the cerebellum
3 bilateral pairs
nerve tracts that connect the cerebellum to the other parts of the brainstem
superior, middle, and inferior
what are the three cerebellar peduncle pairs
superior
middle
inferior
what are the nerve tracts that connect the cerebellum to other parts of the brainstem
cerebellar peduncles
ventricles are
fluid filled cavities in the brain