If you are looking about the latest Information and trending vibes then you are at the right place. Today, the topic of my article is Human Nervous System. Human Nervous System coordinates its actions by transmitting the signal. So, this article is completely about Nervous System.
Detailed Note on Human Nervous System
Psychology is basically derived from a Greek word which means study of soul and mind. Psychology comes from two Greek words i.e. Psychy and Logus. Psychy means knowledge and Logus means knowledge of yourself. So, today i am going to tell you about Psychology as a science of Human Nervous System.
Human Nervous System
Nervous System is a complex combination of cells that allows an organism to gain information about what is going on inside and outside the world and how to respond appropriately.
There are two types of Human Nervous System:
- Central Human Nervous System
- Peripheral Human Nervous System
1. Central Human Nervous System:
The central nervous system is isolated from any direct contact with outside the world. Central Nervous system consists of two things:
- Spinal Cord
Brain is the most complicated structure known in this universe. There are many separate cells in the brain as there are stars in the galaxy. The weight of the brain is about 3 pounds. Brain is touchable. Brain can be exchanged. Brain has a pinkish jelly like structure. 100 million cells works in the brain. Brain is also called most powerful and sophisticated computer in our body.
There are three types of brain:
It is the largest part of the brain. It controls our sense of vision, sleeping, temperature, emotions, reproductive function and visceral functions (Primary Motives). It further includes:
- Left Hemisphere
- Right Hemisphere
It consists of:
- Speech Production
- Organize verbal information
It consists of:
- Poem = Visual
It is located between forebrain and hindbrain. Midbrain relays information between eyes, ears and brain. It has the ability to perceive things usually. It is also known as nerve fiber system. It contain network of many nerves like fiber optics.
Main part of the hindbrain is cerebellum. It is the lowest part of the brain consists of two things:
It is derived from a Latin word means Bridge. Its basic task is to carry information from spinal cord to brain.
It controls finger movements and tongue movements.
(II). Spinal Cord:
It is also known as rope of the skeleton. Spinal cord is a massive collection of neurons within the spinal column. It is protected and surrounded with the hard board. Spinal cord is located in the centre of spinal column from lower back to upper neck.
2. Peripheral Human Nervous System:
Peripheral Nervous System is the network of sensory and motor neurons that form the interface between the central nervous system and the surface of the body. Peripheral Nervous System affects throughout the body.
- Some carry information from each of the sensory receptors as in the eyes, ears, skin and so on to the brain
- Some carry messages from the brain and spinal cord to the muscles.
There are two types of Peripheral Human Nervous System:
- Autonomic Nervous System
- Somatic Nervous System
(I). Autonomic Human Nervous System:
It controls the autonomic activities. It is the part of the peripheral nervous system. It directs the activities which are normally not in individually control. It stays active while a person is sleeping. It sustains the life purposes during anesthesia and prolonged coma state.
Further sub-types of Autonomic Human Nervous System:
- Sympathetic Nervous System
- Parasympathetic Nervous System
(i). Sympathetic Human Nervous System:
It deals with the emergency responding excitement or stressful condition. It is in control and active while a person is in emotional states.
(ii). Parasympathetic Human Nervous System:
It deals with internal monitoring and regulation of variety of functions. The system typically influences activities related to the protection, nourishment and growth of the body.
(II). Somatic Human Nervous System:
The system is under voluntary control. It controls the skeletal muscles of the body.
Neurons are microscopic cells division that work as receptors and transfer information.
It is a protection sheet to protect skull from any damage.
Types of Neurons:
There are three type of neurons:
- Sensory Neurons
- Motor Neurons
- Inter Neurons
(I) Sensory Neurons:
Sensory Neurons are also called afferent neurons and they carry messages in towards the central nervous system to peripheral nervous system.
Light and Sound into the body.
(II). Motor Neurons:
They are also called efferent neurons and they carry information out away from central nervous system towards muscles.
A third category of neurons called interneurons. It helps the central nervous system to communicate with peripheral nervous system and vice versa.
Reflex Arc is a neutral pathway that controls a reflex. This allows for faster reflex actions by activating spinal motor neurons without the delay through the brain.
There are two types:
- Autonomic Reflex Arc
- Somatic Reflex Arc
Autonomic Reflex Arc:
It affects the inner organs.
Somatic Reflex Arc:
It affects the muscles.
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