The Nervous Systems Essay

the body. The central nervous system main function is to receive information from the different parts of the body, in which must be analysed and stored in order for it to send out instructions based on those pieces of information. The central nervous system’s main function is to coordinate the numerous organs and muscles required to perform the individual’s desired action(s) (Walker, 2005). The peripheral nervous system (PNS) is connected directly to the central nervous system, and consists of neurons…

Take notice of figure.1 in the illustrated diagram that the sympathetic nervous system originates in the spinal cord. Specifically, the cell bodies of the first neuron are located in the thoracic and lumbar spinal cord. Axons from these neurons project to a chain of ganglia located near the spinal cord. In most cases, this neuron makes a synapse with another postganglionic neuron in the ganglion. A few preganglionic neurons go to other ganglia outside of the sympathetic chain and synapse there. The…

uses the neurotransmitter called acetylcholine. From this ganglion, the postganglionic neuron projects to the target organ and uses acetylcholine again at its terminal. Figure. 1: Autonomic nervous system Para-sympathetic and sympathetic differences: The sympathetic and parasympathetic nervous system generally have opposing effects on organs they supply, and this enables the body to make rapid and precise adjustments of involuntary activities in order to maintain a steady state. An example…

severed, the nerve fibers can regenerate if the two ends are reattached precisely. However, restored functions may produce different actions because the nerves might not be connected to the right channel. There are three main parts of the nervous system: the central, peripheral, and autonomic…

controlling posture and maintaining the equilibrium. The layer of the brain that covers the Brain stem is the Limbic System, which regulates motivated behaviors, emotional states, memories and is composed of three structures, the Hippocampus, Amygdale, and the Hypothalamus. The important role of acquisitions of memories is part of the largest structure of the Limbic System, the Hippocampus. The Amygdale is controls emotions, aggression, the formation of emotional memory, and has the critical…

The nervous is considered to be the master controlling the systems of the body. The way it does this is to communicate through nervous impulse which is very rapid and very specific. The nervous system consist of the peripheral nervous system (PNS) and central nervous system (CNS). The peripheral nervous system consists of the cranial nervous, spinal nerves and ganglia. The peripheral nervous system can also be broking down into two categories which are somatic nervous system and parasympathetic system…

neurons that connect the Central NS to the rest of the body". It consists of two components, the Somatic nervous system, which controls the movements of our skeletal muscles and the Automatic nervous system, which controls the glands and muscles of our internal organs. The automatic nervous system is a dual system that has influence over the heartbeat, digestion, and glandular activity. These two systems which make up the automatic NS are known as Sympathetic and Parasympathetic NS. The Sympathetic NS…

Qi is the fundamental concept behind the Chinese and Eastern justification for the function of acupuncture. Chinese texts describe channels of energy called meridians that flow throughout the body in regular patterns, a system just like the circulatory system or the nervous system. Flowing through these meridians is Qi, vital life energy. Disease, defined as the imbalance in the flow of Qi, can result from blockage of the meridians or a deficiency of energy. "Disharmony of Qi will affect spiritual…

hypothalamic areas have been shown to modulate erections in rats, including medial preoptic (MPOA) regions (MacLean, 1996), while Barker and Barasi (2005)’s findings suggest the ventromedial area is the main control centre for the sympathetic nervous system and the lateral hypothalamic area being the main centre for parasympathetic activation. Steer (2000) reviews lesion, electrostimulation, and tracing data and identifies two pathways from the hypothalamus to sacral autonomic centres. The first…

synthesis to the tunica muscularis of blood vessels causing vasodilation (Murray;1993). In this manner, NO is a sort of second neurotransmitter potentiating the effects of acetylcholine or bradykinin on the muscular layer of blood vessels. In this system, NOS is located in the endothelial cells; however, in the cerebral arteries, NOS is located in the nerve plexus themselves in the outer layer of cerebral arteries, and the cell bodies of these neurons lie in the sphenopalatine…