Cerebral Cortex and limbic system Flashcards
What seperates the frontal and temporal lobes
Lateral fissure of Sylvius
What seperates teh frontal and parietal lobes
Central sulcus of Rolando
What seperates the frontal and parietal lobes
Cingulate gyrus
Receptive Aphasia
Lesion in temporal lobe and parietal lobe
Produces fluent, receptive or Wernicke aphasia
Gertsmann Syndrome
Lesion of the angular gyrus
Loss of ability to comprehend written language (Alexia) and to write it (Agraphia)
Transcortical Apraxia
Lesion of the corpus callosum caused by an infarct of ACA
Asomatognosia
Widespread lesion in the nondominant right parietal lobe
Unawareness or neglect of the contralateral half of the body
Visual Agnosia
Damage to part of temporal lobes involving the cone stream produces visual agnosia
Inability to recognize visual pattersn
Functions of the limbic system
Visceral: Smell
Sex drive
Memory/learning
Behavior and emotions
Papez Circuit
Cingulate gyrus to the hippocampus
Hippocampus (Via Fornix) to Mammillary body
Mamillary body to Thalams (anterior nucleus)
From Thalams back to Cingulate gyrus
Limbic structures
Hippocampal formation
Amygdala
Septal nuclei
Hippocampal formation consists of
- Hippocampus
- Dentate gyrus
- Subiculum
- Entorhinal cortex
Anterograde Amnesia due to
Bilateral damage to the medial temporal lobes including the hippocampus
Klüver-Bucy syndrome
Bilateral lesion of the amygdala and hippocampus
Klüver-Bucy syndrome results in
- Placidity
- Psychic blindness
- Hypermetamorphosis: visual stimuli
- Increased oral exploratory behavior
- Hypersexuality and loss of sexual preference
- Anterograde amnesia
