Cerebral Cortex- part I Flashcards
Cerebral Cortex
gray matter on top. fold, 6 layers, no fiber tracts. Conscious mind
primary sensory areas, sensory association, multimodal motor
Primary Sensory Areas- somatosensory
postcentral gyrus
general somatic senses are perceived from skin and muscles/tendons. Touch, pressure, vibration, pain temperature
Somatotopy
each region of the cortex receives sensory stimulus from a specific area of the body
sensory homunculus
a body map of the sensory cortex in the postcentral gyrus. amount devoted to a body part is equivalent to its sensitivity. isolateral (upside down)
Primary Sensory Areas- vestibular cortex
processes info from vestibular apparatus.
balance
located in posterior part of the insula lobe
Primary Sensory Areas- Gustatory Cortex
taste. Roof of lateral sulcus
Primary Sensory Areas- olfactory cortex
smell. medial aspect of cerebrum in piriform lobe. Has uncus
Primary Sensory Areas- Rhinecephalon
“nose brain” all parts of the brain that get olfactory signals- piriform lobe, olfactory tracts & olfactory bulbs.
connects to limbic system
Primary Sensory Areas- Visceral Sensory Areas
deep in lateral sulcus on insula lobe. Pain, pressure, hunger from abdomine and thoracic organs
Primary Sensory Areas- Primary visual cortex
deep in calcarnine sulcus in occipital lobe. Largest sensory area. Contralateral
Primary Sensory Areas- Primary auditory
loudness, rhythm and pitch. Superior edge of temporal lobe.
Sensory Association Areas- Somatosensory Association
posterior to primary somatosensory cortex. Integrates various sensory inputs and draws on memories.
Sensory Association Areas- visual association
surround primary visual. Most of the occipital love, analyzes color, form, movement. Proceeds into 2 streams:
- ventral stream
- dorsal stream
Sensory Association Areas- visual association- dorsal stream
where. spatial relationships. parietal cortex
Sensory Association Areas- visual association- ventral stream
what. temporal lobe. recognizing objects, words, faces
Sensory Association Areas- auditory association area
evaluation of different sounds and integrates with memories. Processed parallel in 2 paths that go to multimodal areas.
- anterolateral path
- posterolateral path
Sensory Association Areas- auditory association area- anterolateral path
what. Temporal lobe –> pre frontal. sound identification
Sensory Association Areas- auditory association area- posterolateral path
where. through parietal to prefrontal. location of stimulus
Wernickes Area
one hemisphere (normally left). recognizing and understanding spoken words.
Multimodal Association Areas
get sensory input from many sensory modalities and make associations between new info and past experiences to plan a motor response
Multimodal Association Areas- Posterior Association areas
interface of visual, auditory and somatosensory association areas. Integrates all that plus propioception and vestibular apparatus. Allows awareness of spatial location of the body. Also associated with language comprehension and speech in L. Hemp.
In R. hem- interpretation of words, emotional overtones of speech
Multimodal Association Areas- Anterior Association Areas
prefrontal cortex.
integrates info from all other places to plan and make motor responses. Integrates past experiences through limbic system.
working memory for spatial tasks and object recall tasks
-solving complex multitask problems
-task management
- logic, thinking, perceiving, recalling, abstract ideas, judgement, planning, etc.
Multimodal Association Areas- Limbic association area
emotions
complex person and social interactions
Motor Areas- premotor cortex
plans and coordinates. relays plan to primary motor cortex
