• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/41

Click to flip

41 Cards in this Set

  • Front
  • Back
Diencephalon
(def)
complex structure interposed b/w the brainstem and cerebral hemispheres
Cerebrum
(components)
diencephalon
telencephalon
Diencephalon is divided into two symmetrical parts by _
IIIrd ventricle
Diencephalon
4 major parts
Epithalamus
Thalamus
Hypothalamus
Subthalamus
Epithalamus
(3 parts
Pineal body
Habenular nuclei
Stria medullaris
Pineal body
(part of, aka, shape)
Epithalamus
epiphysis
pine cone shape
secretes substances into CSF
highly vascular
attached to roof of IIIrd ventricle
sensitive to light
circadian rhythms
Habenular nuclei
(part of, input from)
epithalamus
limbic system
Stria Medullaris
(part of)
epithalamus
Largest component of Diencephalon
Thalamus
Thalamus
"gateway to cerebral cortex"
Hypothalamus
(includes)
mammillary bodies
Subthalamus
(parts)
internal capsule
subthalamic nucleus
thalamic reticular nucleus
MGN and LGN
part of Diencephalon
comprise metathalamus
Basic functions of Diencephalon
Epithalamus
autonomic and behavioral responses to emotional changes
Basic functions of Diencephalon
Thalamus
receives sensory and motor input and relays to cerebral cortex
Basic functions of Diencephalon
Hypothalamus
controls ANS and several endocrine glands
responds to changes in circulating blood -integrated with pituitary
neurosecretory cells
major role in emotional responses
hunger, thirst, homeostasis
Basic functions of Diencephalon
Subthalamus
includes subthalamic nucleus which serves motor function
Corpus Striatum
(location, components)
large nuclear masses located lateral to diencephalon
caudate nucleus
lentiform nucleus (putamen, globus pallidus)
neostriatum
putamen + caudate
paleostriatum
globus pallidus
archistriatum
amygdaloid complex
Basal ganglia
(components, role)
corpus striatum, subthalamic nucleus, substantia nigra, amygdala
control of voluntary mvment - internal generation of mvment and automatic execution of motor plans
hypokinetic disorders
signif impairment in movement initiation (akinesia) and reduction in mvmnt amplitude and velocity (bradykinesia)
Dysfunction of basal ganglia
spectrum of mvment abnormalities
hyperkinetic disorders
excessive involuntary mvments called dyskinesias
Internal Capsule
(consists of, location, fan out to become)
ascend and descend fibers that connect thalamus, cortex, bs, sc
concentrated in narrow band b/w thalamus and lentiform nucleus
corona radiata
thus, composed of all asc and desc pathways that connect cerebral cortex with rest of brain
Internal capsule
(2 basic kinds of pw)
thalamocortical fibers (corticopetal)
corticofugal fibers
thalamocortical fibers
asc fibers from thalamus to cortex
corticofugal fibers
desc fibers from cortex to thalamus, bs, and sc
include corticospinal and corticonuclear tracts
IC
3 major parts in horizontal section
V-shaped
anterior limb
genu
posterior limb
IC
Anterior Limb
(location, 2 components)
lies b/w lentiform nucleus and caudate
2 components:
desc corticofugal fibers
anterior thalamic radiation - asc and desc fibers interconnecting the anterior (VA) and medial (MD) thalamus with prefrontal cortex
IC
The Genus
(contains)
corticonuclear (corticobulbar) fibers
IC
Posterior Limb
(location, contains)
lies b/w lentiform nucleus and thalamus
contains corticopontine and corticospinal fibers
Retrolenticular fibers
Sublenticular fibers
Retrolenticular fibers
(emerge from, form _ radiation that _)
emerge from IC and form
optic radiation which
connects LGN with visual cortex
Sublenticular fibers
(emerge from, form _ radiation which _)
emerge from IC and form
auditory radiation which connects the MGN with the auditory cortex
IC
arterial supply
(all)
lateral striate branches of middle cerebral artery to both anterior and posterior limbs
internal carotid artery to genu
anterior choroidal artery to ventrolateral portion of posterior limb, and the entire retrolenticular (or posterior) part of posterior limb
IC
arterial supply
genu
internal carotid artery
IC
arterial supply
both anterior and posterior limbs
lateral striate branches of MCA
IC
arterial supply
ventrolat portion of post limb, and entire retrolenticular part of posterior limb
anterior choroidal artery
Effects of IC Infarction
small lesion = same as large lesion to cerebral cortex
both motor and sensory deficits may result
Infarct of post limb has serious deficits: UMN signs (corticospinals), hemiparesis/plegia on contra side
some lesions may cause loss of general sense (thalamocortical fibers)
auditory or visual deficits may occur (anterior choroidal artery)
Effects of IC infarct
(unique combo)
UMN
visual
auditory