What does a bilateral lesion of the auditory cortex cause?
cortical deafness: react to stimulus, but do not realize itaphasia
Auditory Cortex location
Visual Cortex location
calcarine fissure/occipital lobe
What do unilateral lesions cause in the visual cortex? Bilateral lesions?
unilateral lesions: homonymous visual feild defects or scotomas (small defects)
cortical blindness with anosognosia (denies disability)
What is apraxia?
inability to preform learned, skilled movements
Where would a lesion have to be to lead to apraxia?
supplementary motor area
What is aphasia?
Disturbances in ability to communicate excluding deafness, impairments to vision, or vocal cord function
What are the characteristics of Broca's aphasia?
loss of fluency
distorted speech sounds,but words are correct
What are the characteristics of Wernicke's Aphasia?
fluent, un-intelligble speech, including paraphasias (wrong word or phoneme)
What connects Wernicke's area and Broca's area?
What is the difference between conduction aphasia and Wernicke's aphasia?
Conduction Aphasia there is comprehension intact
lesion is behind temporal lobe
What are the characteristics of Transcortical Aphasia?
non-fluent speech, but repitition is spared
What causes Global Aphasia?
Massive damage in the MCA on the left side
What are the 4 characteristics of global aphasia?
speech comprehesion blocked
speech articulation blocked
automatic speech only
usually accompanied by right sided facial weakness
Inferior Occipito-Temporal Cortex Location
Inferior Occipio-temoral cortex
Face Recognition/association of color
What is the purpose of the frontal lobe? What are they important for?
They are the major assocation cortex-- interconnections with most of the rest of the brain
Restraint, initiative, order
What are two frontal lobe syndromes?
What does a lesion in the orbitofrontal portion of the frontal lobe cause?
disruption of social behavior
What does a leasion in the dorsolateral prefrontal region of the frontal lobes cause?
Abulia: lack of initiative
What is Balint's Syndrome?
a bilateral lesion in the Dorsolateral Parieto-Occipital Cortex
causes simultagnosia which is imparied ability to perceive a whole visual scene as a whole, optic ataxia which is impaired ability to reach for objects under visual guidance, ocular apraxia which is impaired ability to direct gaze through saccades
Where is the knowledge of body in space located?
Posterior Parietal Cortex
What happens if you have a right sided lesion of the posterior parietal cortrex?
left sensory neglect
you might run your left side into a door! or swear someone else is in your bed
What can cause recovery of loss of some symptoms after a stroke?
What lies in the future for Adult CNS Neurogenesis?
Well, we used to think that no new neurons were created after birth, but this is likely wrong and in the future Neurogenesis might be possible.