Flashcards in Forebrain Deck (27)
Can't distinguish faces
-> fusiform face area
Sums are dictated by which part of the brain
Prefrontal lobotomy does what?
-cutting the connections
between the prefrontal cortex (anterior to the motor areas shown
here) and the remainder of the brain
Guy with rod stuck in head
Who pioneered prefontal lobotomy?
António Egas Moniz 1935 nobel 1949
Which structures are attached to corpus callosum and lie between hemispheres?
Fornix and septum pellucidum
Which cortical areas are supplied by the middle cerebral artery?
The bulk of the lateral surface of the hemisphere; except for the superior inch of the frontal and parietal lobe (anterior cerebral artery), and the inferior part of the temporal lobe.
Cerebral aneurysms are usually on
the circle of Willis
- subarachnoid haemorrhage with blood in CSF will result if they rupture
Which cortical areas are supplied by the anterior
and posterior cerebral arteries?
most midline portions of the frontal lobes and superior medial parietal lobes.
occipital lobe, the inferior part of the temporal lobe, and various deep structures including the thalamus and the posterior limb of the internal capsule.
Calcarine sulcus function
The calcarine sulcus is where the primary visual cortex (V1) is concentrated. The central visual field is located in the posterior portion of the calcarine sulcus and the peripheral visual field in the anterior portion.
The uncus is an anterior extremity of the Parahippocampal gyrus.
The part of the olfactory cortex that is on the temporal lobe covers the area of the uncus
Parahippocampal gyrus function
The parahippocampal gyrus (Syn. hippocampal gyrus) is a grey matter cortical region of the brain that surrounds the hippocampus and is part of the limbic system. This region plays an important role in memory encoding and retrieval.
Fusiform gyrus function
The fusiform gyrus is located between the lingual gyrus and parahippocampal gyrus above, and the inferior temporal gyrus below.
-linked to various neurological phenomena such as synesthesia, dyslexia, and prosopagnosia.
Lesion in occipital lobe: effects?
- homonymous hemianopsia vision loss from similarly positioned "field cuts" in each eye.
- visual hallucinations.
-> Lesions in the parietal-temporal-occipital association area are associated with color agnosia, movement agnosia, and agraphia.
- Damage to the primary visual cortex can cause blindness due to the holes in the visual map on the surface of the visual cortex that resulted from the lesions.
Striatal degeneration leads to
A small aneurysm that looks like a berry and classically occurs at the point at which a cerebral artery departs from the circular artery
striatum= largest part of basal ganglia
= caudate nucleus + n. accumbens+ putamen
(the limbic region of striatum
-cocaine raises dopamine levels here
Not part of the basal ganglia.
Notable connections are with the hippocampal formation (memory ) dorsomedial thalamus and medial prefrontal cortex, inputs from nociceptive pathways. The amygdala plays a key role in attaching emotional significance to a stimulus
putamen and globus pallidus
Neostriatum consists of
putamen and caudate nucleus
Which view of the brain is important for strokes?
the internal capsule (white matter)
Striate arteries from ___________ capsule
middle cerebral supply posterior limb of internal
The anterior limb is between
between the head of the caudate nucleus and the lenticular nucleus
The posterior limb is between
behind the genu, between the thalamus and lenticular nucleus