Parts of the brain Flashcards
How many ventricles in the brain?
4
2 lateral and 2 ventricle
Which ventricle can only been seen by the sagittal view?
4th
What is the purpose of the ventricles ?
communicating network
cavities filled with csf (made by choroid plexus) to help buoyancy
What is the size of the ventricles dependent on ?
cortical atrophy (ventricular enlargement when neurones are lost)
What are the following lobes involved in ?
- frontal
- parietal
- occipital
- temporal
frontal = mood, behaviour, decisions
Parietal = sensory
Occipital = visual
Temporal = spatial navigation, language, auditory
What is the name of the bundle of nerve fibres which join the hemispheres together ?
Corpus callosum
What experiment did Roger Sperry carry out ?
Cut the corpus callosum to cause lack of communication between hemisohere to stop the seizures caused by epilepsy
What does the thalamus do?
relay station for sensory info
What does the basal ganglia do?
involved in extrapyramidal motor control
(pyramidal = cortical spinal tract)
What is extrapyramidal motor control?
Initiation and fine control of movement (can also inhibit movement)
What happens if the sub thalamic nuclei is damaged?
Give rise to ballismus (uncontrolled movement of limbs)
What does the striatum do?
dopamine rich
important in extrapyramidal control and impact on mood
What does the limbic system control?
emotion and mood
What are the key nuclei within the limbic system ?
Amygdala, hypothalamus, hippocampus
Where is the amygdala located?
Basal forebrain
