Basal ganglia Flashcards
What does input nuclei consist of? (2)
Caudate nucleus and putamen (together they join together is called nucleus accumbens)
What does intrinsic nuclei consist of? (3)
External globus pallidus, subthalamic nucleus and pars compacta
What does output nuclei consist of?
Internal globus pallidus, pars reticularis
What is lentiform nucleus?
Lentiform nucleus is comprised of globus pallidus and putamen.
What is the function of the caudate?
It is involved in motor processing and planning, memory storage, inhibitory control, procedural learning and decision making.
What is the function of the putamen?
Putamen is connected to head region of caudate nucleus. It is involved in voluntary and involuntary motor control.
What is the function of globus pallidus?
Internal segments of globus pallidus sends output to thalamus via GABA (inhibitory motor function).
External segments of globus pallidus relay information between other basal ganglia nuclei and internal segments of the pallidus.
What is substantia nigra and its function?
Substantia nigra consists of pars reticulata and pars compacta.
Pars reticulata segment (involved in inhibitory pathways) regulates eye movements.
Pars compacta relays information between input and output sources, in motor control and coordination.
They also help regulate mood, learning and control voluntary movement and affect brain’s reward circuit.
What are the main structures involved in the limbic system of the brain?
Cingulate gyrus, fornix, mamillory bodies, hypothalamus, amydala, anterior nucleus of the thalamus, hippocampus
What is the function of corpus callosum?
It is to integrate motor, sensory and cognitive performances between the two different hemispheres of the brain, same as the other.
