The Human Brain
Brain is a complex organ of power and potential. Hence one of the most interesting parts of the body is the human brain. Equally The human brain contains 86 billion neurons responsible for transmitting electrical and chemical signals throughout the body and weighs about 3 pounds. Similarly In simple terms the human brain controls all aspects of basic functions from breathing to complex thoughts, emotions and decision-making.
The structure of the Brain:
Cerebrum: The largest part of the human brain is called the cerebrum, which is divided into two hemispheres, one right hemisphere and the other left hemisphere. As well as these two control different functions. So, in a word, the cerebrum is the source of thought, emotion, and consciousness.
Cerebellum: It’s located at the back of the brain. The cerebellum is responsible for fine motor skills and coordination and balance skills. Also the cerebellum helps ensure smooth, precise movement.
Hypothalamus: The hypothalamus is situated below and in front of the thalamus immediately above the pituitary gland. As a result it concerned with the control of:
- Body temperature
- Thirst
- Control of hunger
- Defensive reaction e.g. fear
- Tone of heart and blood vessel
Medulla Oblongata: It extends from the pons above and is continuous with the spinal cord below.
- Respiratory center
- Reflex center
- Cardiac center
- Vasomotor center
Respiratory center: Respiratory center controls the depth of respirations.
Reflex center: Whenever irritating substances are present in the respiratory tract, nerve impulses pass to the medulla oblongata, stimulating the reflex center, which initiates the reflex action like coughing, sneezing and vomiting.
Cardiac center: As a result:
1.The parasympathetic fibers decrease the rate and force of cardiac contraction
On the other hand,
2.The sympathetic fibers increase the rate and force the cardiac contraction
Vasomotor center: It sends impulses to the blood vessel by sympathetic and parasympathetic nerve fibers. So the sympathetic stimulation causes vasoconstriction and the parasympathetic stimulation causes vasodilation.
Brain Functions: 1.Cognitive Functions
2.Emotion
3.Memory
4.Motor Control
5.Autonomic Functions
Brain Health and Disorders: As a result:
1, Common Brain Disorders
2.Neurodegenerative Diseases
Brain Waves: As a result: 1.Delta Waves
2.Alpha Waves
3.Theta Waves
4.Beta Waves
The Role of Diet and Exercise: As a result:
1.Exercise on the other hand
- Diet
The human brain is an incredible organ that enables everything from basic survival to complex thought. So we should do more research on the brain to know better.