Cerebral Hemispheres Flashcards
Define:
Sulcus
Gyrus
Fissures
Sulcus - Depressions on the brain
Gyrus - Elevations on either side of the sulcus
Fissures - Deep Sulci
What is the location of the grey and white matter
Grey matter outside
White matter inside
What is the basal ganglia
Collection on neural cell bodies buried in the white matter
What is the name of the deep fissure that separates the two cerebral hemispheres
Median longitudinal fissure
What is the bridge connecting one cerebral hemisphere to the other
Corpus callosum
What is the fissure called that separates the cerebral hemisphere and the cerebellum
Transverse fissure
What separates the frontal from the temporal lobe
The lateral sulcus
What separates the frontal and parietal lobe
The Central sulcus
What Gyrus sit beside the central sulcus
Infront - Pre central gyrus
Behind - Post central gyrus
What separates the occipital and parietal lobe
Parieto-occipital sulcus
Only seen on the medial surface
What sulci and gyrus sits above the corpus callous
Cingulate sulcus and glyrus
Where is the hippocampus located
Curved under the on the medial surface of the temporal lobe
Where is the insula located
Folded deep within the lateral sulcus
separates the frontal and parietal lobes from the temporal lobe
Name the 4 lobes of the brain
Frontal - Motor Function, Higher Mental Functions and Intellect
Parietal - Somatosensory (touch, temp, pain, pressure)
Temporal - Hearing and Smell
Occipital - Vision
What is the area No.4 in the frontal lobe,
Precentral gyrus
What is the function of area no. 4
Is the primary motor complex (all neurones from here relate to moving muscles in the body)
There is somatotopic representation in the pre central gyrus, what is this
= Motor Homunculus,
which means the amount of space the a muscle group takes up is dependant on how much dexterity a muscle group uses not on the size of the muscle
What is the area No.6 in the frontal lobe,
Pre Frontal cortex
What is the function of area no.6
Organises how muscle groups act together
cognitive functions of higher order- intellect, judgement, prediction, planning
What is area no. 8 associated with
frontal eye fields
What is area no. 44-45
Brocas area of motor speech
How does Brocas area of motor speech work
Thought process feeds into brocas area,
Broca area decides how we formulate what we want to say
Info then goes to percentral gyrus, and stimulates all the muscles we use to talk
What is area, 1, 2 and 3 in the parietal lobe, and where are they exactly located
Primary sensory area lying in the post central gyrus,
What is the function of area 1, 2 and 3 in the parietal lobe
Receives general sensation from contralateral half of the body and has somatotopic representation
What is the functions of the superior parietal lobe
Consciousness awareness of contralateral half of the body
Sensory association area - interpretation of general sensory information
What is the function of inferior parietal lobe
Global association area - makes sense of all information given
How does the location of the inferior parietal lobe aid its function
interface between somatosensory cortex and visual and auditory assocation area
What is the symptoms if lesion occurs in the parietal lobe on the non dominant side
Hemisensory neglect - perceive the sensation but don’t understand they have other half of the body (agnosia)