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)

OVERVIEW OF LIMBIC STRUCTURES

OVERVIEW OF LIMBIC STRUCTURES

OVERVIEW OF LIMBIC STRUCTURES

THE LIMBIC SYSTEM

HYPOTHALAMUS

FUNCTION OF THE HYPOTHALAMUS

SECRETION OF THYROID HORMONES

REGULATION OF BODY WATER

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

REWARD AND PUNISHMENT

●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

THANKS FOR YOUR ATTENTION