Hypothalamus Centre for the integration of visceral reflexes, thus maintaining constant internal environment.

Slides:



Advertisements
Similar presentations
Integrative Function of the Nervous System
Advertisements

NEUROENDOCRINOLOGY, KEY POSITION OF HYPOTHALAMUS Olga Vajnerová, 2nd Faculty of Medicine, Charles University, Prague, 2011.
NEUROENDOCRINOLOGY, KEY POSITION OF HYPOTHALAMUS Olga Vajnerová, 2nd Faculty of Medicine, Charles University, Prague, 2011.
LECTURE 31- DIENCEPHALON AND PITUITARY GLAND
Key Issues part one: Almost every subdivision of the CNS communicates with the Hypothalamus. The hypothalamus communicates with virtually all peripheral.
5. Major Brain Structures from the Bottom-Up
LIMBIC SYSTEM LECTURE 12 DR.ZAHOOR.
Limbic System – Hippocampus and Amygdala Prof. K. Sivapalan.
CENTRAL ADJUSTING OF AVTONOMIC FUNCTIONS Levels of ANS Control Figure 14.9.
The Hypothalamus Anatomy and Function.
PROF. ASHRAF HUSAIN Key concept for hypothalamic function is HOMEOSTASIS Its goal is to maintain internal homeostasis There are both neural and hormonal.
Lower Level Brain Structures. These are the inner most levels of your brain This part of the brain developed first.
The limbic system Neuronal circuitry controls of emotional behavior and motivational drives Neuronal circuitry controls of emotional behavior and motivational.
Hypothalamus position Floor of third ventricle (Tuber cinerum and Mamillary bodies) MM TC.
Chapter 15 Chemical Control of the Brain and Behavior.
Mind, Brain & Behavior Friday March 7, Diffuse Enteric System  A third major division of the autonomic nervous system.  Neural control unit between.
Hypothalamus NEU 257 3/3/2011. The diencephalon “between brain” Posterior part of embryonic forebrain Lies between brainstem and cerebral hemispheres.
1 Chapter 6 Diencephalon Chris Rorden University of South Carolina Arnold School of Public Health Department of Communication Sciences and Disorders University.
Limbic System – Hippocampus and Amygdala Prof. K. Sivapalan.
Thalamus, Hypothalamus,Epithalamus
PHYSIOLOGY OF PAIN AUTONOMIC NERVOUS SYSTEM, HYPOTHALAMUS, Dr Joan Kumar Asst Prof –Physiology.
Emotion and Motivation. Pleasure, elation, ecstasy, sadness, depression, fear, anger and calm imbue our action with passion and character Emotion, like.
Diencephalon & Autonomic Nervous System
LIMBIC SYSTEM NBIO 401 Robinson. Objectives: -1) Be able to describe the major inputs and outputs, function, and the consequences of lesions or electrical.
CHAPTER 17 The Hypothalamus: Vegetative and Endocrine Imbalance
Chapter 14 The Brain. Medulla Oblongata Regulates heartbeat and respirations Blood vessel diameter Decussation Reflexes: –Swallowing –Vomiting.
 Mostly hidden from view  Between cerebral hemispheres  2% of CNS by weight  Widespread and important sensory connections.
Learning & Memory.
Hypothalamus And Limbic System
Lobes: FRONTAL LOBESOCCIPITAL LOBESPARIETAL LOBESTEMPORAL LOBES THE FOUR REGIONS OF THE CEREBRAL CORTEX OF EACH OF THE TWO HEMISPHERES.
Anatomy of the Diencephalon,
Sulci (sulcus) – grooves on surface of cerebrum. 1) Sensory areas 2) Association areas 3) Motor areas Three kinds of cerebral functional area: Gyri.
Neuron soma deep within the brain
Sub cortical Brain Structures. Sub cortical - underneath the cortex –hypothalamus and pituitary –basal ganglia –limbic system –hindbrain and brainstem.
Neuro Revision Emily Hodgson. LIMBIC SYSTEM Mamillary bodies Ant. Nucleus of thalamus Cingulate gyrus Parahippocampal gryus Hippocampus Entorrhinal.
Diencephalon and telencephalon. Surface structure medial surface of the diencephalon –interthalamic adhesion or massa intermedia connects two thalami.
The Hypothalamus Medical Neuroscience Dr. Wiegand.
The Diencephalon SHANDONG UNIVERSITY Liu Zhiyu. Position of Diencephalon Position: Lies between midbrain and cerebrum, almost entirely surrounded by cerebral.
THALAMUS.
Diencephalon.
DO NOW What did you learn about the right and left hemispheres? List 3 thing that each of the lobes is capable of!
HYPOTHALAMUS It is located in the middle of the base of the brain, and encapsulates the ventral portion of the third ventricle.
The Central Nervous System
ORGANIZATION OF THE NERVOUS SYSTEM D. C. Mikulecky Professor of Physiology.
The reticular formation The reticular formation. Reticular Formation Reticular Formation   loosely arranged neuron cell bodies intermingled with bundles.
Biology and Behavior Ch.3 Holt- Psychology Principals in Practice.
The Diencephalon. The Diencephalon Position of Diencephalon Position: Lies between midbrain and cerebrum, almost entirely surrounded by cerebral.
Cerebral Cortex Thoughts and actions Frontal Lobe: Consciousness, what we do according to our environment, judgment, emotional response, language, gives.
Chapter 33 Regulation of the Visceral Function by the Nervous System.
THE LIMBIC SYSTEM Physiology Unit
THALAMUS& LIMBIC SYSTEM THALAMUS& Lecture 27Functions of thalamus and limbic system At the end of the session the students should be able to: a Classify.
Subthalamus & Hypothalamus Dr Zeenat Zaidi DIENCEPHALON.
Olga Vajnerová 2. LF UK Praha. Hypothalamus, a major control headquarters for the limbic system Hypothalamus Cortex Thalamus Temporal lobe Basal ganglia.
Hypothalamus BLOCK 3 – Robert R. Terreberry, PhD Room 142 Ph
THE LIMBIC SYSTEM.
The Brain The Developing Brain Parts of the Brain & their Function
The Brain The Developing Brain Parts of the Brain & their Function
HYPOTHALAMUS The hypothalamus is a very small, but extremely important part of the diencephalon that is involved in the mediation of : endocrine, autonomic.
The diencephalon.
HYPOTHALAMUS Dr .A .S. Subhashini.
HYPOTHALAMUS.
Olga Vajnerová 2. LF UK Praha
Hypothalamus Domina Petric, MD.
Sub cortical Brain Structures
Thalamus Prof. K. Sivapalan.
The Diencephalon 间脑 山东大学医学院 解剖教研室 李振华.
GOOD MORNING! TAKE OUT YOUR WARM UP SHEETS
HYPOTHALAMUS.
THALAMUS Lecture 4.
Hypothalamus and its functions.
Presentation transcript:

Hypothalamus

Centre for the integration of visceral reflexes, thus maintaining constant internal environment

Control centres in the hypothalamus 1- Anterior centres Supraoptic (water regulation, wakefulness) Paraventricular Medial & posterior nucleus Anterior hypothalamic area (modify parasympathetic function)

Control centres in the hypothalamus 2- Medial centres Dorsomedial (sympath. Function) & ventromedial (satiety) nuclei

Control centres in the hypothalamus 3- Lateral centres Lateral hypothalamus (sympath. Function, feeding)

Control centres in the hypothalamus 4- Posterior centres Posterior hypothalamus Prefornical nucleus mammilary body arcuat & periventricular zone

Connection of the hypothalamus Afferent from:  Preolfactory area  Limbic lobe  Amygdala  Hippocampus  Non specific thalamic nuclei  GP

Connection of the hypothalamus Collaterals from:  Sensory ascending tracts

Connection of the hypothalamus Efferent to:  Neurohypophysis  Ant. Thalamic nuclei  Brain stem RF

Function of the hypothalamus 1- Autonomic function All autonomic functions are modified by the hypothalamus Anterior hypoth. »»»» parasympathetic Post. Hypoth., Dorsomed., Lateral »»»» sympathetic

Function of the hypothalamus 2- Temperature regulation Post. Hypoth. »»» reflex response activated by cold (cautanouse vasoconstriction, shivering) Ant. Hypoth. »»» heat-loosing mechanisms (cutanouse vasodilatation, sweating)

Function of the hypothalamus 3- Body water regulation Thirst centre in the supraoptic (secret vasopressin) region of the hypoth.

Function of the hypothalamus 4- food intake regulation Feeding centre (Lateral hypoth) Stimulation:  Hunger, desire to search for food »»» Obesity Damage: Sever loss of appetite (anorexia) Satiety centre (ventromedial nucleus) Stimulation: Anorexia Damage :  Feeding centre become active »»» hyperphagia & obesity (hypothalamic obesity)

Function of the hypothalamus 5- Defence reaction Expression of rage, fear and other emotion

6- Wakefulness & sleep hypothalamus is part of RAS involved in initiation & maintenance of alert & wakefulness Stimulation of anterior hypoth. »»»» sleep Lesion of anterior hypoth. »»»» wakefulness »»»» death from exhaustion Supraoptic nucleus ( dawn to afternoon, dusk)

Function of the hypothalamus 7- Relation to cyclic phenomena Hypoth. Lesion »»»» disruption of circadian rhythm( secretion of ACTH & melatonin)

Function of the hypothalamus 8- behavioural & sexual function Hypoth. Is part of the limbic system Stimulation of certain parts of the hypoth. »»»» fear, pleasure, feeding, emotional reaction, sexual stimulation

Function of the hypothalamus 9- Neuroendocrin function Control of ant. & post pituitary

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2024 SlidePlayer.com Inc. All rights reserved.