1: Basic Topography Of The Nervous System Flashcards
What sulcus separates the frontal from the parietal lobes?
Central sulcus
Where is the primary motor cortex located?
Precentral gyrus
Where is the sensory cortex located?
Post central gyrus
What does the lateral sulcus separate?
Frontal and parietal lobes from the temporal
What are the layers of meninges?
Dura (double layered)
Arachnoid
Pia
What is the innervation and the arterial supply of the dura mater?
CN V
MMA
Which meningeal layer is avascular?
Arachnoid
What is the function of the ventricles of the brain?
Production of CSF
Which ventricle/s contain the most choroid plexus?
Lateral ventricles
What is the name of the channel that drains CSF between the 3rd and 4th ventricle?
Cerebral aqueduct
What is the falx cerebri?
A fold of the meningeal layer of the dura mater that separates the right and left cerebral hemispheres
What is the thin sheet that separates the cerebellum from the cerebrum?
Tentorium cerebelli
What is the corpus callosum?
White mater structure connecting the right and left hemispheres
What artery do the vertebral armies form when they converge?
The basilar artery
The middle cerebral arteries arise from which artery?
The internal carotids
Which arteries do the vertebral arteries arise from?
Subclavian arteries
What are the 3 main constituents of the Circle of Willis?
Anterior cerebral Middle cerebral (from ICAs) Posterior cerebral (from divergence of basilar)
Which artery supplies the most medial portion of the cerebrum?
Anterior cerebral arteries
Which part of the cerebrum do the middle cerebral arteries mostly supply?
Lateral part
Which region of the body is represented most laterally in the motor homonculus?
Face
CSF circulates in which space in the brain?
Subarachnoid space
Which lobe is the hippocampus located in?
Temporal lobe
Which type of spina bifida is associated with no obvious physical deformity and just a bony vertebra arch defect?
Spina bifida occulta
How does spina bifida meningocele differ to myelomeningocele?
In meningocele there is a protrusion of the skin due to a protrusion of the dura and arachnoid mater forming a cyst filled with CSF, but there is no spinal cord present in the sac
There is spinal cord present in the sac in a myelomeningocele
