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Lecture 10

NROB60-LEC10.docx


Department
Neuroscience
Course Code
NROB60H3
Professor
Janelle Leboutillier
Lecture
10

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NROB60 LEC10
ANNOUNCEMENTS
note about chapter 7
- not doing DEVELOPMENTAL SECTION (p178-195; BUT I THINK WE SHOULD
KNOW THE FIGURES AND THE BOLDED TERMS)
- 2 tables in that section that are fair game
- otherwise, eth in chapter 7 and appendix is testable
[18]
BASAL GANGLIA
[19]
BASAL GANGLIA FUNCTIONS
- initiates voluntary movements
- maintains muscle tone
muscle tone (residual muscle tension or tonus) is the continuous and passive
partial contraction of the muscles, or the muscle’s resistance to passive stretch during
resting state.[1] It helps maintain posture, and it declines during REM sleep.
- brings purpose to movement
- the reason for making movements
- gate way for expression of sensory-driven & goal-oriented movemt
[20]
BASAL GANGLIA STRUCTURES
- Key ones are:
- PUTAMEN

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- CAUDATE NUCLEUS
- GLOBUS PALLIDUS
- SUBTHALAMIC NUCLEUS
- SUBSTANTIA NIGRA
NOTE: BASAL GANGLIA IS IN CNS
- even tho. "ganglia" stands for group of nuclei that is in PNS only
[21]
FIGURE 14.11
- STRAITUM = CAUDATE NUCLEUS + PUTAMEN
- THALAMUS
- green labelled structure
- heavily involved w/ basal ganglia structures
(ventral lateral nucleus = VL) => ventral lateral nucleus of thalamus

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[21H]
medium spiny neurons
medium spiny neurons
- special type of inhibitory cells representing approximately 90%
of the neurons within the corpus striatum of the basal ganglia.
- play a key role in initiating and controlling movements of the
body, limbs, and eyes.
- can clearly see their dendritic spines coming from from the dendrites of cell
- can use this to assess activity of neuron by counting them and looking at
changes in type, amt, distance apart they are
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