BIOL 6265 Lecture Notes - Lecture 3: Superior Frontal Gyrus, Middle Frontal Gyrus, Middle Temporal Gyrus
Gyri
Folds of cerebral tissue/gray matter/neuron cell bodies
Sulci
Depressions separating gyri
What separates the L and R hemispheres?
Longitudinal Fissure
What separates the frontal from the parietal lobe?
Central Sulcus
What connects the L and R hemispheres?
Corpus Callosum
Insular Lobe
Under cerebral cortex, directly underneath the lateral fissure, big fold
Limbic Lobe
Memory and emotional processing
Wrap around corpus callosum
What are the 4 lobes?
Frontal, Parietal, Temporal, and Occipital
4 gyri in frontal lobe?
Pre-central gyrus, Superior frontal gyrus, middle frontal gyrus, and inferior frontal gyrus
Pre-central gyrus
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Associated with voluntary movement
Superior frontal gyrus
Associated with motor planning
Middle frontal gyrus
Associated with eye movements
Inferior frontal gyrus
Broca's area - motor programming for speech articulation (left hemisphere)
3 gyri in parietal lobe?
Postcentral gyrus, spramarginal gyrus, angular gyrus
Postcentral gyrus
Associated with sensation from the surface of the body
Supramarginal gyrus
Associated with perception, repetition/motor planning of speech, and with writing (integration of
auditory, visual, and tactile/kinesthetic info)
Angular gyrus
Associated with reading and the comprehension of written material (integration of auditory, visual, and
tactile/kinesthetic info)
What are the 3 gyri of the temporal lobe?
Superior temporal gyrus, middle temporal gyrus, and inferior temporal gyrus
Superior temporal gyrus
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Includes Heschl's gyrus, the auditory reception area, and Wernicke's Area
Important in associating words & concepts
Middle temporal gyrus
Associated with higher-order processing of auditory information
Inferior temporal gyrus
Associated with storage of words, and higher-order processing
What is the primary anatomical part of the occipital lobe?
Calcarine sulcus
Calcarine Sulces
Regions surrounding this "valley" serves as the primary visual reception area of the brain
What does visual processing looking like in the brain?
Flipped and upside down
What are the association areas found in the frontal lobe?
Primary motor cortex, premotor area, supplementary motor area, broca's area, and prefrontal cortex
Primary Motor Cortex
(M1 or 4)
Descending motor neurons for initiating voluntary movement contralaterally
Premotor Area
(PMA or 6)
Motor planning, complex skill & voluntary movement
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Document Summary
Under cerebral cortex, directly underneath the lateral fissure, big fold. Pre-central gyrus, superior frontal gyrus, middle frontal gyrus, and inferior frontal gyrus. Broca"s area - motor programming for speech articulation (left hemisphere) Associated with sensation from the surface of the body. Associated with perception, repetition/motor planning of speech, and with writing (integration of auditory, visual, and tactile/kinesthetic info) Associated with reading and the comprehension of written material (integration of auditory, visual, and tactile/kinesthetic info) Superior temporal gyrus, middle temporal gyrus, and inferior temporal gyrus. Includes heschl"s gyrus, the auditory reception area, and wernicke"s area. Associated with storage of words, and higher-order processing. Regions surrounding this valley serves as the primary visual reception area of the brain. Primary motor cortex, premotor area, supplementary motor area, broca"s area, and prefrontal cortex. Descending motor neurons for initiating voluntary movement contralaterally. Mediates speech initiation and the decision to initiate the act. Close to m1 area for lip, jaw, & tongue movement.
