Lecture - Nervous System (Neuroanatomy 3 Jasoni)

Question 1

Somatic motor pathways:

1. What’re the two we are discussing?
2. Consist of several _____ areas that are devoted to different aspects of movement
3. What thing plans and what thing executes the movement?
4. So, the corticospinal and corticobulbar are modulated by what 4 things that correct and refine movement (w/o conscious awareness)

Answer 1

• Exert voluntary control over movement
• Consist of several cortical areas devoted to different aspects of movement

– Planning movement = Premotor and supplementary motor cortex

– Execution of movement = Primary motor cortex

• Modulated by extracortical brain areas that refine and correct movement

(without conscious awareness)

– Cerebellum - Basal ganglia

– Red nucleus - Tectum

Question 2

Label

Answer 2

Question 3

Label

Answer 3

Question 4

Answer 4

Question 5

What is the basal ganglia, where is it and what is it made up of?

Answer 5

• Groups of cell bodies involved in motor control
• Position = subcortical
• Basal ganglia dysfunction ! Parkinson’s disease
• Groups of cell bodies making up the basal ganglia:

– Caudate nucleus (forebrain)

– Putamen (forebrain)

– Globus pallidus (forebrain)

– Subthalamic nucleus (brainstem)

– Substantia nigra (brainstem)

Question 6

Terminology:

1. Pallidum
2. Lentiform nucleus
3. Corpus Striatum
4. Striatum

Answer 6

• Pallidum = globus pallidus

– Two divisions: external (GPe) and internal (GPi)

• Lentiform nucleus = putamen + globus pallidus
• Corpus Striatum = Lentiform nucleus + caudate nucleus
• Striatum = putamen + caudate nucleus

Question 7

Answer 7

Question 8

Taken through the absolute middle

Answer 8

Question 9

Imagine what the fornix looks like and label it

Answer 9

Question 10

Where does the fornix fit?

Answer 10

Question 11

What is the fornix?

Answer 11

White matter (axons) tract connecting

hippocampus and mammilary bodies