The nervous system and the anatomy of the brain

The interior of the cerebral hemispheres, including the diencephalon, contains not only white matter but also large masses of gray matter known collectively as basal ganglia.

Your Brain & Nervous System

Thermoreceptors detect temperatures inside the body and in its surroundings. The brain stem is formed by the diencephalon, midbrain, pons, and myelencephalon, or medulla oblongata. In other cases, there may be more severe motor impairment — a child may have trouble talking and doing basic movements like walking.

Finally, some nerves are mixed nerves that contain both afferent and efferent axons. One very large fiber tract, the corpus callosum, connect the cerbral hemispheres; such fiber tracts are called commisures. Hypothalamus Controls Temperature The hypothalamus is like your brain's inner thermostat that little box on the wall that controls the heat in your house.

The optic nerve II carries visual information from the eyes to the brain. These are called lobes, and there are four of them: The pons and the medulla, along with the midbrain, are often called the brainstem.

Maybe you got the exact toy you wanted for your birthday and you were really happy. It occupies the upper two-thirds of the vertebral canal. Thinking and voluntary movements begin in the cortex.

Picture of the Brain

The cerebrospinal fluid circulates around the pia and below the outer arachnoid, and this space is also termed the subarachnoid space. An inherited nerve disorder that affects the brain. Because of the variety of voltage-sensitive ion channels that can be embedded in the membrane of a neuron, many types of neurons are capable, even in isolation, of generating rhythmic sequences of action potentials, or rhythmic alternations between high-rate bursting and quiescence.

Functional classification groups neurons according to the direction the nerve impulse is traveling relative to the CNS; on this basis, there are sensory, motor, and association neurons. All animals that have been studied show circadian fluctuations in neural activity, which control circadian alternations in behavior such as the sleep-wake cycle.

Doctors who treat them are called neurologists. Blood supply The brain is supplied by the cerebral branches of the vertebral and internal carotid arteries, the meninges mainly by the middle meningeal branch of the maxillary artery. The axon terminal is separated from the next cell by a small gap known as the synaptic cleft.

Nervous System Anatomy and Physiology

If your clothes from last year are too small, it's because your pituitary gland released special hormones that made you grow. A surgeon drills a hole into the side of the skull to relieve high pressures.

The pons also contains the nuclei and fibers of nerves that serve eye muscle control, facial muscle strength, and other functions.

Neurons may have hundreds of the branching dendrites, depending on the neuron type, but each neuron has only one axon, which arises from a conelike region of the cell body called the axon hillock.

Instead of a one or two step chain of processing, the visual signals pass through perhaps a dozen stages of integration, involving the thalamus, cerebral cortex, basal ganglia, superior colliculus, cerebellum, and several brainstem nuclei.The nervous system of vertebrates (including humans) is divided into the central nervous system (CNS) and the peripheral nervous system (PNS).

[15] The (CNS) is the major division, and consists of the brain and the spinal cord. [15]. Nov 23,  · Anatomy and Physiology of Nervous System Part Brain brain games anatomy human body human anatomy pituitary gland human resource management human heart spinal cord human brain cerebral cortex human.

The nervous system serves the regulation and adaptation of the organism to changing conditions of the environment and the internal body. It is a communicating and controlling organ which innervates all organs of the body/5(). The brain is one of the largest and most complex organs in the human body.

Nervous System

It is made up of more than billion nerves that communicate in trillions of connections called synapses. The brain is. The nervous system consists of the brain, spinal cord, sensory organs, and all of the nerves that connect these organs with the rest of the body.

Together, these organs are responsible for the control of the body and communication among its parts. Anatomy of the Nervous System If you think of the brain as a central computer that controls all bodily functions, then the nervous system is like a network that relays messages back and forth from the brain to different parts of the body.

Download
The nervous system and the anatomy of the brain
Rated 4/5 based on 51 review