Basal Ganglia Flashcards
Basal ganglia is made up of neurons called?
Nuclei
Basal ganglia neurons:
Caudate nucleus: combined with the putamen form the striatum
Basal ganglia directs what?
- )Motor expression of emotions
- ) direction and amplitude of movement
- controls and regulates activities of the pre motor and motor cortex. Enables voluntary movements to be performed smoothly - ) decision about movement
- helps determine the decision of which of several possible behavior to execute
Putamen
Most lateral of basal ganglia
Globus pallidus
Lies medial to putamen and lateral to thalamus. It is the output nucleus of the basal ganglia, sending inhibitory projections to the thalamus
Substantia nigra
Contains dopaminergic neurons that project to the putamen, caudate and subthalamic nucleus
Subthalamic nucleus
Receives affarents from both cortex and other basal ganglia structures.
Clock of basal ganglia
Putamen and caudate nuclei receive excitatory input from?
Cortical and subcortical structures
The striatum is compressed of?
Caudate nucleus and putamen
Lentiform nucleus is comprised of?
Globes pallidus and the putamen
What is not part of the basal ganglia?
The Thalamus but it works to control movement
pathways of basal ganglia- direct and indirect
communicating via pre and post synaptic neurons to different location,communicating via neurotransmitters
presynaptic neurons release?
GABA for inhibition or glutamate for the excitation of post synaptic neurons
basal ganglia direct pathways
facilitates target-oriented and efficient behavior
excitatory connection from the cortex to putamen
cortical activation
- excites putamen
- inhibits globalpallidus
- releases thalamus from inhibition
