Motor neuron

It is a condition that gives rise to unusual muscle stiffness. Spastic paralysis occurs when tendon reflexes of the muscle in the paralyzed region occur due to upper motor neuron disease. These spasms are spontaneous and uncontrolled. It changes skeletal muscle performance in muscle tone involving hypertonia. This is a condition that arises when the nerves coordinating the voluntary muscle actions are disabled. During this…

from the root words neutron and plastic, the word neuron meaning the nerve cells in our brain and the word plastic meaning to mold, sculpt or modify) refers to the brains potential to reorganise itself, alter its structure and change its function by creating new neural pathways, to necessarily adapt to circumstances due to injury, growth or acquirements. Neurons next to damaged brain areas have the ability to reconnect pathways between other neurons, forming new circuits that can resume some of…

Introduction With each case study, I will explore and analyze the various scenarios and the impact the ailments have on the nervous system. Each scenario has its own effect on areas of neurons, the method of sending and receiving neurotransmitters, and the lasting effects of the impaired neurons. Case Study 1: Amy Amy burns her finger while cooking dinner. The natural response for someone that touches something hot is to pull their hand away from the heat. This response is provoked by general…

uses neurons to transmit signals to my body that allows me to make quick motions. Sensory neurons send messages from my muscles and sensory organs, like my eyes and ears, to my brain and spinal cord. My brain then processes that message and sends a response back to my muscles via motor neurons. If, for instance, one of my teammates is heading for the ball the same time I am and we are about to collide, my brain has an internal communication system that allows it to intervene with the motor…

manipulated in order to elucidate the receptive fields of the electrosensory neurons of the lateral line lobe. The experiment described above involving the Eigenmannia in a two-compartment chamber apparatus allows researchers to identify the approximate location of the neuron’s receptive field responding to amplitude modulations (Heiligenberg 1987). In order to identify the approximate location of the receptive fields for neurons that are responding to phase modulations, a different, more…

Amyotrophic Lateral Sclerosis or ALS is a progressive neurodegenerative disease that affects nerve cells in the brain and spinal cord. Motor neurons reach from the brain to the spinal cord and from the spinal cord to the muscles throughout the body. The progressive degeneration of the motor neurons in ALS eventually leads to their death. When motor neurons die, the ability of the brain to initiate and control muscle movement is lost. With voluntary muscle action progressively affected, patients…

PD. Parkinson’s disease is a disorder of the nervous system which causes one to not be able to control their normal movements. The way this works is that there is a malfunction and death of neurons in the brain , specifically substantia nigra, which is the movement control center in the brain. These dying neurons produce dopamine and as time goes on the amount dispersed decreases, therefore causing Parkinson’s disease. This disorder begins most commonly after age 50, known as late onset. But…

components, a motor efferent system and a sensory afferent system.…

Hence, due to the blocking properties of lignocaine, it prevents the depolarization of the postsynaptic neuron, and averts the initiation of an action potential (Sheu and Lederer, 1985). The effects of lignocaine on the intestinal smooth muscle are described to be concentration-dependent contractures (F A., 1986). Thus, in the experiment, as the amplitude…

Student no:16472374 The nervous system and neuron communication The nervous system is a highly complex and broad area of biopsychology. People depend on the nervous system for their survival and safety.This essay will explore the components from which the nervous system is composed and their main functions. This essay will also decipher the mechanisms through which neurons communicate. According to Carlson (2014) the Nervous system is branched into two categories - the central nervous system…