Week 2 - Wet Room Flashcards
What kind of fibres pass through the corpus callosum?
Commisural fibres
What are the 4 pasts of the corpus callosum?
Rostrum
Genu
Body
Splenium
What is the septum pellucidum?
Thin sheet which lies in the mid saggital plane and separates the anterior horns of the two lateral ventricles
What is the septum pellucidum continuous with?
Where does it extend?
Superiorly with the corpus callosum and inferiorly with the fornix
It extends posteriorly as far as the interventricular foramen (the connection between the lateral ventricle on each side and the 3rd ventricle
What is the fornix?
Bundle of fibres which links the hippocampus with the mammillary bodies of the hypothalamus
What bulbous projection exists on the floor of the lateral ventricle?
Caudate nucleus
This is one of the basal nuclei
What is the function of the thalamus?
The thalamus is a sensory relay area made up of smaller masses of grey matter nuclei, each with different functions.
Most of the general sensory information from the body relays to a nucleus called the venture-postero lateral (VPL) nucleus of the thalamus
What is the function of the hypothalamus?
Responsible for production of many essential hormones, These govern temperature regulation, thirst, hunger, sleep, mood, sex drive, and the release of other hormones within the body.
This area of the brain houses the pituitary gland and other glands in the body.
The pineal gland lies immediately posterior to the thalamus.
Where are the colliculi in relation to the pineal gland?
Immediately inferior
What is the pineal gland?
Small endocrine gland in the vertebrate brain.
It produces melatonin, a serotonin derived hormone, which affects the modulation of sleep patterns in both seasonal and circadian rhythms.
What do the globus pallidus and the putamen form?
Lentiform nucleus
What is the corpus striatum?
Caudate nucleus + lentiform nucleus
Basically the basal ganglia
What is the internal capsule made up of?
Myelinated axons (white matter) Projection fibres (connect cerebral hemispheres with other parts of the brain
What are the parts of the internal capsule?
Anterior limb
Genu
Posterior limb
Which cerebral artery through one of its branches supplies the internal capsule?
Anterior cerebral artery
What group of structures is the substantia nigra functionally a part of?
Basal ganglia
Where would the red nucleus be in relation to the substantia nigra?
Posterior
Which part of the pons would motor fibres that form the medial lemniscus occupy?
Rostral Medulla
What level does the spinal cord terminate in adults?
L2
How does the presence of white and grey matter differ at each spinal cord segment?
Higher levels contain greater amounts of white matter.
this is because ascending tracts gain fibres at each successive level whereas the opposite is true for descending fibres
Which aspect of the spinal cord receives sensory nerve fibres?
Dorsal
From which aspect of the spinal cord do motor fibres project?
Ventral
Why does the the size of the ventral grey horn vary along the spinal cord?
Presence of motor neurones innervating the upper and lower limbs
What is the name of the hole in the middle of the spinal cord and what does it contain?
Central canal and CSF
