Cerebral Hemispheres Flashcards
(39 cards)
What is a Basal Nuclei/Ganglia?
Group of neuronal cell bodies (grey matter) can be within the brain
Brain grey on surface, white on inside, true or false?
True
What is a fissure?
A deeper separation of the gyrus/ a deeper sulcus
Layers of meninges?
Pia mater (inside) -> Arachnoid mater -> dura mater (most external)
Dip between 2 cerebral hemispheres
Median Longitudinal fissure
What connects the 2 erebral hemispheres?
Corpus Callosum
What sulcus separates frontal and pareital?
Central sulcus
What sulcus separates the frontal from temporal
Lateral sulcus
Pre and post central gyrus
Hang out around the central sulcus
Where is Cingulte sulcus?
In middle of brain like an aora ring above and following the Corpus Callosum
What are frontal,temporal and parietal lobes separated into?
Frontal and temporal: Superior, middle and inferior lobules
Parietal = Superior and inferior lobules
What is the transverse temporal gyri?
The Top part of the temporal lobe that goes deep and leads to the Insula (inside gyri)
Where is the hipocampus?
In coronal section of the brain, it is the basal, medial aspect of the temporal lobe looks more like a curled up snake than a seahorse
What are Brodman areas
Areas of the brain which are numbered and differenctiated due to their different histological appearances
Sensory vs motor sections in the head
Sensory = behind the central sulcus
Motor = infront of the central sulcus
What is the limbic system and where is it?
Medial portions of the cerebral hemisphere, used for storage and retrieval of processed information
what are primary and association areas?
Primary area is the region in which the hard out information comes in or goes out eg holding pound coin, is round, hard, cold etc. Association area is the part that puts that infomation together to come to conclusions eg - it’s likely to be a pound coin.
What is area no. 4?
Primary Motor Cortex (Think - we have 4 limbs)
What is area 6 and 8?
They are the association motor cotexes, so behind the prefrontal cortex and infront of the primary motor cortex. It is the bridge between the cognition and cognitive functions of higher order stemming form the prefrontal cortex, finguoibg out how ot actually do it so it can give the primary motor cotex exact instructions.
eg: prefontal cortex decides I need to jump across a stream to get to the apple tree
Areas 6 and 8 know this means jumping across so gives the instructions ot the specific parts of the primary motor cortex eg bend knees, hips and ankles and contract them all in the right order to produce movement.
What is motor homunculus?
The representation of out different body parts over the specific part of the primary motor cortex. Remember the creepy monkey guy thing with big hands and face n tongue with the representations of everything, which are spread out linearly across the primary motor cortex
What are areas 44/45
Broca’s area of motor speech. It is in the frontal lobe (duh) but it is in the association area just infronnt of the corrospoding primary motor cortex for the mouth, tongue and lips (so handy!) (Inferior frontal gyrus)
Primary sensory area no.
3,1,2 (1,2,3 but we can’t say 1,2,3 for some reason)
What is the sensory association area
Superior parietal lobule (interpretation and general sensory information and concious awareness of contralateral half of the body)
What is important about the inferior parietal lobule
Interface between the somatosensory cortex, visual and auditory association areas (global coordination area - touch, sight and hearing).
Dominant hemisphere contributes to language.
