Med Neuro Flashcards
What are 4 types of brain herniations?
- Subfalcine 2. Central 3. Transtentorial 4. Tonsillar
Which type of brain herniation syndrome has no symptoms?
Subfalcine - limbic lobe [emotion] is compressed (sagittal section of brain)
Which type of brain herniation syndrome can result in abducent nerve palsy?
Central - brainstem towards foramen magnum inferiorly - pressure on cranial nerves
What is compressed in a transtentorial herniation?
Medial temporal lobe - uncus [smelling]
Which type of brain herniation syndrome can affect respiratory centers?
Tonsillar - from increased pressure in cranial cavity
What are the only two places the arachnoid mater dips into the sulci and fissures of the brain?
- Falx 2. Tentorium
Where is the CSF located?
In the subarachnoid space
Where does the CSF return to the venous circulation?
Through the arachnoid villi
Arachnoid villi
Projections of arachnoid and subarachnoid space projecting into dural venous sinuses
Pia mater
- Follows contours of brain 2. Covers vessels of brain separates subarachnoid from perivascular space [Virchow-Robin space] 3. 2-3 cells thick; microscopic
What does the interventricular foramen of Monro connect?
The lateral ventricles to the 3rd ventricle
What is the role of the choroid plexus?
Secretes CSF
Septum pelucidum
Separate lateral ventricles
What 3 main functions does the frontal lobe have?
- Higher cognitive function - personality/judgements 2. Primary motor cortex - control of voluntary movements 3. Motor area for speech
What 2 main functions does the parietal lobe have?
- Conscious sensation - pain, pressure, touch 2. Association cortices (associate what sensation is coming from)
What 2 main functions does the temporal lobe have?
- Comprehension of language 2. 1˚ auditory cortex - hearing
Wernicke’s area is located where?
Superior temporal gyrus
What are the 2 main functions of the occipital lobe?
- Vision 2. Processing visual information - motion, edge, color
Where is the 1˚ visual cortex located
Occipital lobe along calcarine fissure - striate cortex - Brodmanns area 17
What are the 5 main functions of the Limbic Lobe?
- Fighting 2. Fleeing 3. Feeding 4. Feeling 5. Fucking
Uncus (Limbic)
Part of 1˚ olfactory cortex
Amygdala
Cluster of grey matter - emotions and memory
Insula
Homeostasis, motor control, emotions, self (deep to temporal lobe)
What are two types of basal ganglia (clusters of neural bodies)?
- Caudate nucleus 2. Lenticular nucleus














































