Dorsal/Lateral Flashcards
(20 cards)
Neurons
- Cells
- Appear gray
Axons
- Fibers
- Appear white
Glia
- Supportive tissue
Longitudinal Fissure
Separates 2 hemispheres
Corpus callosum
Band of white commissural fibers that joins the 2 hemispheres
Commissure
Bundle of axons which connects structures in the 2 hemispheres
Cerebral Cortex
the thin layer of gray matter forming the surface of the hemishpheres
Gyri
folds
Gyri are separated by groves called ____; some of the more important ____ are called ____.
- sulci
- sulci
- fissures
Cruciate fissure
- Runs laterally from the longitudinal fissure so as to divide the hemisphere into and anterior third and posterior two-thirds
What fissure is analogous to the central sulcus of the human brain?
cruciate fissure
Superior frontal sulcus
- Runs forward from about the middle of the cruciate fissure to the rostral tip of the hemisphere
- Lateral boundary for the superior frontal gyrus
Lateral fissure/fissure of Sylvius
- Begins on dorsal surface about half an inch behind later extremity of cruciate fissure and then divides into a short posterior ramus of the lateral fissure and a longer anterior ramus of the lateral fissure
Suprasylvian sulcus
Arches over upper extremity of lateral fissure, its posterior limb extending backward toward the occipital pole
Rhinal fissure
Marks horizontal boundary b/w the lateral and ventral surfaces and runs the length of the brain
- Separates neocortex from olfactory cortex
Frontal lobe
- Part of hemisphere anterior to cruciate fissure
- Control of motor functions
Parietal lobe
- Includes one-half of dorsal surface behind the cruciate fissure and above suprasylvian fissure
- Somatosensory cortex
- Processes info such as touch, pain, and temperature
Occipital lobe
- Occupies posterior end of hemisphere and processes visual info
Temporal lobe
- Separated from parietal lobe above by the posterior two-thirds of the suprasylvian fissure
- Involved in hearing and vision
Insula
- Area enclosed b/w diverging anterior and posterior rami of the lateral fissure and rhinal fissure
- Insular cortex mediates taste