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31 Cards in this Set

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  • Back
The Three Meninges
Dura Mater
Arachonoid Marter
Pia Mater
Describe the Dura Mater
tough material double layered membrane: one layer attached to inner surface of skull and the other covers the brain
Describe Arachoid Mater
separated by a subdural space filled with fluid; has threadlike projections (spiderweb) bridges this space
Describe Pia Mater
soft tissue lies on surface of brain; highly vascular
What are the 4 structures of the Brain
1-cerebrum
2 - Diencephalon
3-Hindbrain
4-Cerebellum
What is the main function of the cerebrum
largest area of brain 2 hemispheres
What is the main function of the Diencephalon
Information is sorted-out; emotion center
What is the main function of the hindbrain
Brainstem
autonomic centers, relay center
What is the main function of the cerebellum
coordination of voluntary muscles
Fissures
extremely deep grooves
Sulci
shallow grove between 2 gyri
Gryi
a ridge between 2 sulci
What are the 2 main fissures of the Cerebrum?
Longitudinal Fissure - separates the right and left hemispheres
Transverse Fissure - separates the occipital lobe from the cerebellum
What are 3 main Sulci
Central Sulcus - separates the frontal lobe from he parietal lobes
Lateral Sulcus - separates the temporal lobe from frontal and parietal lobe
Parieto-Occipital Sulcus - visible only internally, separates the occipital lobe from the parietal lobes.
What are the 4 main Gyri
Pre-Central gyrus - primary motor area - concious control of skeletal muscles
Post-Central Gyrus - Primary Somatosensory area- sensory receptors
What is Cerebral Cortex
Gray matter (cell bodies of cerbral neurons) outermost part of the cerebrum-recieves input from sensory neurons
What is Cerbral Medulla
White Matter
the corpus callosum and other commisures;
association tracts
projection tracts
commissures
Association Tracts
connecting two parts of the same hemisphere
Projection tracts
run between cerebral cortex and lower brain or spinal cord
Commissures
run from one hemisphere to the other
What is Basal Nuclei
Gray Matter - regulates voluntary motor activities
What are 2 characteristics of the Cerebral Hemispheres
1 - Lateralization of function (division of Labor) each section has unique abilites that are not shared by the other hemisphere
2 - Contralateralization of motor and sensory activity - found in both hemispheres; provides a backup if one side is damages
Left side of the brain
Language Brain- language skills, speech, math & logic
Right side of the brain
Abstract conceptual or spatial processes, artistic or creative
Frontal Lobes/pre-frontal lobes
Concerned with voluntary motor functions, motivation, forsight, planning, memory, emotion, social judgements and aggression
What are 2 areas of the Frontal lobes and their funciton
Pre-Central Gyrus - Primary Motor Area
Broca's region - found only in the left hemisphere- specialized motor speech, damage to this area reduces or eliminates the ability to articulate words
What is the Parietal Lobes main funciton
involved in sensory reception and integration
2 Main areas of the Parietal Lobe
Post-central Gyrus - primary Somatosensory Cortex, receives input from sensory receptors of skin, and muscles
Wiernickes Region - found in left hemisphere, ability to sound out unfamiliar words
What is the main function of Temporal lobes
Primary Auditory Cortex
What is the main function of the Occipital lobes
Primary Visual Cortex
What is the main function of Insula
has a role in understanding the spoken language; taste and sensory input form the visceral receptors