Motor neuron

numerous functional areas. For example, dopamine is highly concentrated in regions that regulate motivation and feelings of reward (Dombeck, 2002). A neurotransmitter's impact also depends on whether it stimulates or decreases activity in its target neurons. Drugs make their effects by increasing or interfering with the activity of neurotransmitters and receptors within the synapses of the brain. Agonistic drugs improve the message carried by the neurotransmitters. Antagonistic drugs,…

This paper explores the published articles that report on results from research conducted on the central nutrients influence for child’s brain development and function during pregnancy and after birth as well as how it is affect to their adulthood. Brain development begins prenatally and continues through school age. It begins with the formation of brain cells, followed by cell migration and differentiation, and the development of synapses to enable cells to communicate with one another. Myelin…

Results indicated that average reaction times for the auditory and visual stimuli tests were both significantly different from that of the control conditions (see table 1 and figures 1, 2 and 3). Differences in average reaction time differing from the control test (test 1) range from as little as 4 milliseconds (test 2, test subject 2) to that of 67 milliseconds (test 4, test subject 3) (see table 1 and figure 1, 2 and 1.3). According to the averages of the percent increase in reaction time, the…

using sensory receptors. Sensory receptors are made up of sensory nerve cells and support cells. There are millions of nerve cells in the human body that control just about every move you make, the human brain alone carries about 100 billion neurons. Every neuron…

cells are called neurons. A neuron is basically an on/off switch just like the one you use to control the lights in your home. It is either in a resting state (off) or it is shooting an electrical impulse down a wire (on). It has a cell body, along little wire (the "wire" is called an axon), and at the very end it has a little part that shoots out a chemical. This chemical goes across a gap (synapse) where it triggers another neuron to send a message. There are a lot of these neurons sending…

Acetylcholine was the first neurotransmitter discovered. It is the neurotransmitter associated with learning, thought, arousal, and activation of muscles. Acetylcholine enables movement by sending messages from motor neurons to muscles. This neurotransmitter is also linked with memory. Those with low acetylcholine can have Alzheimer’s disease. Alzheimer’s disease is associated with problems in memory, language, and thinking. For example, those with Alzheimer’s will slowly forget people’s names…

flexor digitorium superficialis (FDS) and to extrapolate the nerve changes from a sciatic nerve of a frog. Neurons are excitable cells structural features such as dendrites, cell body and axon. Excitable cells generate electrochemical impulses also known as an Action Potentials (AP), which propagate down an axon to transmit a signal to another cell. The signal may be transmitted to another neuron through a synapse of another dendrite or will form a Neuromuscular junction with a skeletal muscle…

person with a progressed state of amyotrophic lateral sclerosis goes through on a daily basis. Amyotrophic Lateral Sclerosis (ALS) or Lou Gehrig’s disease is a progressive neurological disease that affects the motor neurons of the brain and spinal cord. For some reason the motor neurons associated with ALS degenerate and eventually die off affecting the muscles and physical functions. ALS only affects voluntary muscles; therefore, involuntary muscles such as the heart, lungs, and senses are…

on one side of the body as a typical onset. B. PD involves malfunction and/or death of neurons in the brain, which are vital nerve cells. 1. PD affects certain areas and structures of the brain called the substantia negra, the globus pallidus, basal ganglia, cerebral cortex, and a few others. In Latin, substantia negra means “black substance”, and that portion of your brain shows…

chapter with a lot of vital information about the nervous system, the neurons, the brain, the endocrine system, and genetics and behavior. The nervous system helps the body carry vital information from and to the brain. The brain can adapt to certain environments and can change depending on the environment that you are in and your way of thinking. It can spread information with the help of neurons, who pass information from one neuron to the next. There are two different pathways in the…