1.1 Basic Topography Of Nervous System Flashcards
What is the name of the sulcus that separates the frontal lobe from the parietal lobe?
Central sulcus
Where is the primary motor cortex located?
In the precentral gyrus
Where is the sensory cortex contained?
In the post central gyrus
What does the lateral sulcus separate?
The frontal and parietal lobes from the temporal lobe
What are the layers of the meninges called?
Dura mater
Arachnoid mater
Pia mater
Which meningeal layer is the only layer present in the vertebral column?
Dura mater
Has two layers, thick outer and thinner inner which is present in the vertebral column
What is the innervation and arterial supply of the dura mater?
CN V
MMA
Which meningeal layer is avascular?
Arachnoid mater
Also has no innervation
What is the function of the ventricles of the brain?
Production of CSF
Which ventricle/s contain the most choroid plexus?
The two lateral ventricles, which are also the largest
What is the name of the channel that drains CSF between the 3rd and 4th ventricles?
Cerebral aqueduct
What is the falx cerebri?
A fold of dura mater that separate the right and left cerebral hemispheres
What is the thin sheet that separates the cerebrum from the cerebellum?
Tentorium cerebelli
What is the corpus callosum?
A white mater structure that connects the right and left hemispheres
What are the main arteries that supply blood to the brain?
Paired vertebral arteries
Paired internal carotid arteries
These form the Circle of Willis
At what spinal levels do the common carotid arteries birfurcate?
C4
Which arteries do the vertebral arteries arise from?
The subclavian arteries
How do the vertebral arteries reach the brain?
Arise from subclavian arteries
Ascend up posterior side of the neck, through holes in the transverse processes of the cervical vertebrae
They enter the cranial cavity via the Foramen magnum and give off branches before converging to form the basilar artery, which then bifurcates to form the posterior cerebral arteries
What are the three main constituents of the Circle of Willis?
Anterior cerebral arteries (terminal branches of ICAs)
Internal carotid arteries
Posterior cerebral arteries (terminal branches of vertebrals)
(Connect through anterior communicating arteries and posterior communicating arteries)
Which artery supples most of the medial portion of the cerebrum?
Anterior cerebral arteries
Which part of the cerebrum do the middle cerebral arteries mostly supply?
The lateral part
Considering the motor homonculus, which region of the body is represented most laterally in the primary motor cortex?
Face
Lower limb most medially, then upper limb, then face
CSF circulates in which space in the brain?
The subarachnoid space
Which lobe is the hippocampus located in?
Temporal lobe
