Flashcards in Diencephalon Deck (30):
What are relay nuclei?
Nuclei receiving input from defined sensory or motor pathways that project to restricted, clearly delineated cortical regions.
What are association nuclei?
Thalamic nuclei with more widespread cortical connections. Involved with integration and correlation.
What are non-specific nuclei?
Thalamic nuclei receiving input from the brainstem reticular formation, such as the intralaminar nuclei, are designated as non-specific. Invovled in cortical activation.
What is the external medullary lamina?
surrounds the thalamus
consists of thalamocortical and corticothalamic tracts
In what lobe is the amygdale nucleus?
What is the difference between the basal ganglia's effect on movement and the ventral anterior nucleus's affect on movement?
BG initiates and controls movement
VA plans complex movements
What is included in the diencephalon?
What ventricle does the diencephalon enclose?
What is the epithalamus made up of?
What is the function of the pineal body in humans?
What two projections have direct access to the cortex?
on the locus ceruleus, norandrenergic collection of neurons have direct access to the cortex
What is the function of the hypothalamus?
visceral control and maintenance of homeostasis
mediates limbic system activity
What divides the hypothalamus from the thalamus?
What are the four major nuclear groups in the thalamus?
lateral nuclear group
What is included in the media nucleus?
dorsomedial (mediodorsal, MD) nuclear group
What is included in the dorsal tier of the lateral nuclear group?
lateral dorsal nucleus
lateral posterior nucleus
What is included in the ventral tier of the lateral nuclear group?
ventral anterior nucleus
ventral lateral nucleus
ventral posterior nucleus (lateral and medial divisions)
lateral geniculate body
medial geniculate body
The pars reticulata has similarities in connectivity and histology to what part of the basal ganglia?
globus pallidus interna
By what route does the cerebellum affect UMNs?
Via ventral lateral nucleus of thalamus
Which thalamic nuclei are embedded in the internal medullary lamina of the thalamus?
What causes thalamic syndrome?
ischemia or hemorrhage stroke involving posteromedial penetrating arteries involving VPL and VPM
What are Sx of thalmic syndrome? Contralateral or ipsilateral to lesion?
loss of proprioceptive sensation
problems with locomotion
inc pain sensitivity
What is the function of the lateral nuclear group of the hypothalamus?
regulation of feeding behaviour
What syndrome results from interruption of sympathetic pathways from the paraventricular nucleus?
Where do the columns of the fornix end?
What is the subthalamus involved in?
Lesions in the subthalamic nucleus produce a severe motor disturbance known as
QUIZ YOURSELF ON THE INPUTS/FUNCTIONS/OUTPUTS OF THE THALAMIC AND HYPOTHALAMIC NUCLEI
What divides the thalamus into the anterior, medial and lateral nuclear groups?
Internal medullary lamina