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Diencephalon/Telencephalon
Test 5 material
91
Anatomy
Graduate
09/01/2010

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Term
Boundaries of the diencephalon:
Definition
Sup- body and trigone of lat. ventricle

Rostral- interventricular foramen of Monro, ant. commisure, lamina terminalis

Post- post. commisure

Post/Inf- plane from post. commisure to just caudal to mamillary bodies

Ant/Inf- optic chiasma and median eminence of the hypothalamus

Term
What are the components of the diencephalon?
Definition
Thalamus (dorsal thalamus)
Epithalamus
Subthalamus (Ventral thalamus)
Hypothalamus
Term
visual cortex (calcarine cortex) associated with:
Definition
lateral geniculate nucleus
Term
auditory cortex (transverse temporal gyrus of Heschl)associated with:
Definition
medial geniculate nucleus
Term
primary and secondary sensory cortices (postcentral gyrus)associated with:
Definition
ventral posterolateral nucleus
and ventral posteromedial nucleus
Term
Ventral anterior nucleus is the location for:
Definition
premotor cortex (supplementary motor)
Brodmann area 6 and 8
Term
Ventral lateral nucleus is the location for:
Definition
motor cortex- Brodmann area 4, in the pre-central gyrus
Term
What are the types of thalamic nuclei?
Definition
sensory
motor
limbic
multimodal
intralaminar
Term
Name the sensory thalamic nuclei:
Definition
med. and lat. geniculate, ventral posterolateral, ventral posteromedial
Term
Name the motor thalamic nuclei:
Definition
ventral anterior
ventral lateral
Term
Name the limbic thalamic nuclei:
Definition
dorsomedial
anterior
Term
Dorsal medial nucleus is associated with:
Definition
pre-frontal cortex and hypothalamus
Term
Anterior nucleus associated with:
Definition
cingulate gyrus
Term
Lateral posterior nucleus associated with:
Definition
Sup. parietal lobule
Term
Lateral dorsal nucleus associated with:
Definition
cingulate gyrus
Term
Name the multimodal thalamic nuclei?
Definition
lateral posterior
lateral dorsal
pulvinar
Term
Pulvinar associated with:
Definition
frontal, occipital, parietal and temporal lobes
Term
Name the intralaminar thalamic nuclei:
Definition
centromedian
parafascicular
intralaminar
reticular
Term
Centromedian nucleus associated with:
Definition
neostriatum (caudate nucleus) and motor cortex
Term
Parafascicular nuclei associated with:
Definition
rostral and lateral frontal lobe
Term
_________and_________make up the thalamic nuclei.
Definition
intralaminar
reticular
Term
Thalamic nuclei are classified as_______ or ________based on their projections to the cerbral cortex.
Definition
specific
non-specific
Term
Components of the epithalamus:
Definition
pineal gland
habenular nuclei
stria medullaris thalami
Term
Pinealocytes synthesize _________ from __________.
Definition
melatonin
serotonin
Term
Components of the subthalamus:
Definition
subthalamic nucleus (nucleus of Luys)
prerubral field (Field H of Forel)
zona incerta
Term
Functions of the subthalamic nucleus:
Definition
-receives input from motor cortex
-integrates activity with the globus pallidus of the basal ganglia
Term
Lesions of the subthalamic nucleus result in ___________________.
Definition
hemiballismus
Term
Hemiballismus results in rapid flailing movements of the ________________.
Definition
contralateral upper extremity
Term
The__________connects the ___________ with the base of the hypothalamus.
Definition
infundibulum
pituitary gland
Term
Main visceral control center of the body
Definition
hypothalamus
Term
Lateral spinothalamic tract
Definition
pain perception and localization
Term
dorsal column- medial lemniscal pathway
Definition
discriminative touch and proprioceptive sense perception
Term
ventral and dorsal trigeminothalamic tracts synapse in the ______ __________ _______.
Definition
ventral posteromedial nucleus
Term
Circuit of Papez =
Definition
Anterior nuc. of thalamus => Cingulate gyrus => Parahippocampal gyrus => Hippocampus => Fornix => Mammillary bodies => Mammilothalamic tract => Anterior nuc. of thalamus
Term
The hypothalamus forms the inferolateral wall of the ____________.
Definition
third ventricle
Term
Extends from the optic chiasma to the posterior margin of the mammillary bodies
Definition
hypothalamus
Term
bodily homeostasis maintained by the:
Definition
hypothalamus
Term
Hypothalamus maintains bodily homeostasis by regulating:
Definition
-autonomic nervous system activity at brainstem and spinal cord levels
-BP and HR, respiratory and digestive functions
-emotional response and behavior
-temperature
-food intake
-water balance and osmolality of the blood
-sleep-wake cycles, circadian rhythms
-Secretion of releasing and inhibiting hormones that control the anterior pituitary gland
-synthesis of ADH and oxytocin
Term
The __________ centers of the hypothalamus regulate ____ and ____, respiratory and digestive functions.
Definition
autonomic
BP
HR
Term
What is circadian rhythm?
Definition
increased melatonin secretion during the night; diminished secretion with exposure to light
Term
In what 2 centers of the hypothalmus is food intake regulated?
Definition
satiety
feeding
Term
_________/ ___________ produced by the hypothalamus helps to regulate water balance and osmolality of the blood
Definition
vasopressin/ antidiuretic hormone
Term
"biological clock"
Definition
suprachiasmatic nucleus
Term
Components of the telencephalon:
Definition
cerebral cortex
cereral ventricles
white matter
basal ganglia
Term
The telencephalon was derived as an invagination of the_______________.
Definition
prosencephalon
Term
The telencephalon gave rise to the____________ vesicles which became the __________ hemispheres
Definition
telencephalic
cerebral
Term
Developmental growth of the brain occurs in a ______, _______, and ________ direction
Definition
rostral, caudal, and inferior
Term
pattern of growth of the brain
Definition
C-shaped
Term
Lobes of the brain:
Definition
frontal
parietal
temporal
occipital
limbic
insular
Term
The insular lobe of the brain is found in the ____________.
Definition
Sylvian fissure
Term
Gyri of the limbic lobe:
Definition
singulate
subcallosal
parahippocampal
Term
Frontal lobe located anterior to the ________.
Definition
central sulcus
Term
Primary motor area (precentral gyrus)
Definition
Brodman area 4
Term
__________ lobe located posterior to the central sulcus.
Definition
parietal
Term
primary sensory area -Brodman 3, 1, 2
Definition
post central gyrus
Term
Occipital lobe located behind the ___________.
Definition
parieto-occipital sulcus
Term
Brodman area 17
Definition
primary visual cortex
Term
Temporal lobe located:
Definition
inferior to the lateral sulcus
Term
Temporal lobe contains Brodman areas ____ and _____.
Definition
41- primary auditory cortex
22- Wernicke's area- language comprehension
Term
Auditory association cortex located in:
Definition
temporal lobe
Term
Brodmann area 8 (frontal gaze center) function:
location:
Definition
concerned with eye movements,
frontal lobe-middle frontal gyrus
Term
Brodmann areas ____ and ____ involved with __________. Responsible for word formation via connections with adjacent primary motor area.
Definition
44, 45
motor and speech
Term
Brodmann area 44/45 located in _________ frontal gyrus of __________ cerebral hemisphere.
Definition
inferior
dominant
Term
Lesion in the inferior frontal gyrus/ Brodmann area 44/45 results in:
Definition
Loss of ability to produce speech (Broca’s/motor/nonfluent aphasia)
Term
Patients with Broca's aphasia lose the ability to produce speech but can _____, ______, and ______ the words that they hear or wish to say.
Definition
think
understand
write
Term
The longitudinal fissure of the brain divides these lobes.
Definition
frontal
parietal
occipital
Term
Associtaion fibers of the white matter of the telencephalon are classified as:
Definition
short
long
Term
In short association fibers, communication is established with:
Definition
only adjacent gyri within a lobe or adjacent lobes of the brain
Term
In long association fibers, communication is established:
Definition
between 2 or more lobes of the brain
Term
Establishes communication between the frontal lobe and the temporal lobe
Definition
arcuate fasciculus
Term
2 types of myelinated nerve fibers
Definition
commissural
projection
Term
The 3 commissural fibers
Definition
Corpus callosum
Anterior commissure
Commissure of the fornix (Hippocampal commissure)
Term
3 types of fibers in white matter:
Definition
association
commissural
projection
Term
The 2 projection fibers:
Definition
internal capsule
optic radiation (Geniculocalcarine tract)
Term
____________ fibers connect corresponding regions of the two hemispheres.
Definition
commissural
Term
The ______ ventricle separates the two sides of the diencephalon.
Definition
3rd
Term
The cerebral aqueduct separates the ___ and ____ ventricles and is associated with the ____________.
Definition
3rd, 4th;
mesencephalon
Term
The ____ ventricle is located anterior to the cerebellum and is associated with the ____________________.
Definition
4th;
meten-myelencephalon
Term
The caudate nucleus, the putamen, and the globus pallidus are collectively known as the:
Definition
corpus striatum
Term
The lenticular (lentiform) nucleus is comprised of the _________ and the __________.
Definition
putamen
globus pallidus
Term
The caudate nucleus is referred to as the:
Definition
neostriatum
Term
The globus pallidus is referred to as the:
Definition
paleostriatum (pallidum)
Term
Components of the basal ganglia:
Definition
caudate nucleus
globus pallidus
putamen
amygdala
claustrum
substantia nigra
Term
The ____________ has only a functional relationship to the basal ganglia.
Definition
substantia nigra
Term
What ventricle is found within the diencephalon?
Definition
3rd
Term
The posterior commissure in the epithalamus is responsible for
Definition
eye movement and pupillary light responses
Term
major relay center
Definition
thalamus
Term
responsible for neuroendocrine, autonomic, and emotion
Definition
hypothalamus
Term
contains the pineal gland and the posterior commissure
Definition
epithalamus
Term
On the ventral surface of the hypothalamus you will find:
Definition
optic chiasm
infundibulum (pituitary stalk)
mammillary bodies
Term
function of the basal ganglia
Definition
modulates the functions of the frontal cortex- motor function
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