Limbic System
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Transcript of Limbic System
KURSK STATE MEDICAL UNIVERSITY
DEPARTMENT OF NORMAL
PHYSIOLOGY Madam Repalova Natalya Vladmirovna
PhD, assistant
Kursk State Medical University,
STUDENT: Adegbamigbe Oluwasefunmi
Ayodeji
Group No. 1
PLAN
Components of Limbic system
Structure of the limbic system
General functions of the Limbic system
Specific functions of parts of limbic system
Association areas; Prefrontal, Limbic, Broca,
Wernicke
Concept of dominant hemisphere.
Limbic system
Limbic lobe Structures connected to limbic lobe
Telencephalon
Olfactory cortex
Basal nuclei
Amygdala
Septal nuclei
Substantiainnoominata
Nucleus accumbens
Diencephalon
Thalamus
Anterior nuclei
Dorsomedialnucleus
Hypothalamus
Mamillary body
Epithalamus
Habenula
Pineal gland
Mesencephalon
Reticular formation
Periaqueductalgrey matter
LIMBIC LOBE
Limbic lobe refers to structures that form a limbus (ring) around the brain stem.
Limbic lobe
Limbic gyrus
Parahippocampalgyrus
Cingulate gyrus
Subcallosal gyrus
Paraterminal gyrus
Intra-limbic gyrus
Hippocampus
Indusium griseum(supracallosal gyrus)
CARDIOVASCULAR REGULATION
Stimulation of different areas throughout the
hypothalamus can cause many neurogenic
effects on the cardiovascular system,
including increased heart rate, and
decreased heart rate.
FUNCTION OF HIPPOCAMPUS
Required for the formation of long term
memory
maintenance of cognitive maps for
navigation.
FUNCTION OF AMYGDALA
Behavioral awareness
Relation between thought and surroundings
Appropriate behavioral response for each
occasion
●If no reward and
punishment, repetition of
stimuli will cause
habituation and therefore
will cause the animal to
ignore it.
●If got reward and
punishment effect,
stimuli will be reinforced
and animal will build up
strong memory trace.
●So this 2 effect are
important in learning and
memory and selection of
information do take
place.
Technique for localization reward and punishment centers in the brain of a monkey
ASSOCIATION AREAS:
PARIETO-OCCIPITOTEMPORAL ASSOCIATION
AREA
1-analysis of spatialcoordination of the body
2- area for languagecomprehension
3- area for initialprocessing of the visual language(reading)
4- area for the naming of objects
PREFRONTAL ASSOCIATION AREA
1- association with
the motor cortex to
plan complex
patterns and
sequence of the
motor movements.
2- working memory:
transform words in
information.
3- carrying out
thought processes in
the mind.
LIMBIC ASSOCIATION AREA
The LimbicAssociation Area isprimarily concernedwith behavior, emotion, motivation.
Is associated with the limbic system thatprovides most of the emotional drives for setting the otherareas of the brain intoaction and evenprovides the motivational drive for the process of learning itself.
BROCA’S AREA
A special region in the frontal cortex, providingthe neuronal circuit for word formation.
Plans the motor patterns for the espressingindividual words or even short phrases are initiated and executed.
WERNICKE’S AREA
Direct connect with cortex, visual area, auditory area, language comprehesion, inteligence.
General interpretative area. Knowing area.
It plays the greatest single role of any part of the cerebral cortex in the high comprehensive levels of the brainfucntion. (inteligence, interpreting the complicatedmeanings of differents patterns of sensory experiences).
CONCEPT OF THE DOMINANT HEMISPHERE The general interpretation function of the
Wernicke’s area and the angular gyrus as wellas the functions of the speech and the motor controlareas are usually much more developed in the one cerebral hemispherethan in the other.
95% of the population have the left dominanthemisphere.
Ex.: Lefty and
Dexterous