Lecture 15 Flashcards
What can the temporal lobe be broken into and what does damage to the medial gyrus do?
The temporal lobe can be broken up into the superior (auditory), middle (damage to right causes copying okay, visual memory impaired, damage to left causes hearing to be ok but verbal memory is impaired) and inferior temporal gyrus.
What does removal of the medial temporal lobes show for memory? What memories are safe?
The medial temporal lobes are not where memory is stored, but they are important for consolidating memories (storing them permanently). Though not all memories are impaired e.g muscle memory. Also old memories are safe.
What are the two memory systems, which is retained in medial temporal lobe damage?
The two memory systems are the declarative (explicit), these are the facts and events. The Nondeclarative (implicit) involves skills and habits, priming, simple classical conditioning and nonassociative learning. The individual components change often however. The nondeclarative will be retained in medial temporal lobe damage.
Where is the parietal lobe and what does damage typically do?
The parietal lobe stretches from behind the central sulcus to the lateral sulcus if it were extended out. Damage to this can cause impairments in integrating sensory information, impairments in control of movement, impairments in guiding movements to points in space, impairments in abstract concepts, impairments in directing attention. All impairments are in processing spatial information.
What can left parietal damage lead to?
Left parietal damage leads to agraphia (difficulty in writing due to difficulty in organising letters on a page), acalculia (inability to do complicated math problems due to inability to position the numbers properly, can add and subtract fine unless carry over is required), Right/left confusion (dyslexia) and difficulty in drawing details (global shape generally okay).
What can right parietal lobe damage lead to?
Right parietal lobe damage can lead to difficulty in recognising unfamiliar views of objects, difficulty in drawing the overall shape (but details are there), contralateral neglect (ignores half of world, but not blind, just completely ignored, can’t turn that way either unless moved). Clinical tests for contralateral neglect include line cancellation and letter cancellation or line bisections (cutting line in half, as though the line only starts at halfway). This appears to be post perceptual as they will still tend to prefer the better option.
