Electrical signals called impulses are carried throughout the nervous system by specialized cells called neurons.…
The communication process of neurons in the brain occurs through an electrochemical process. Neurons pass neurotransmitters through the dendrites, which are attached to the ends of each neuron and receive messages from neighboring neurons. The chemical messages that are passed from one neuron to the next cause an action potential. This occurs when the receiving neuron accepts the right amount of the correct message. Once the message is received, the neuron will then send neurotransmitters to the next neuron through the axon. After the neurotransmitters pass through the axon they are released through the terminal buttons.…
When neurones are stimulated they transmit an electrical impulse. Neurones transmit electrical impulses through the polarization inside the membrane of a neurone.…
different stimuli on a minute to minute basis. Specialized cells called neurons work together to…
Part of a neuron that contains a nucleus but does not incorporate the axon and dendrites…
4. Since at any moment a neuron is likely to have thousands of neurons releasing neurotransmitters at its surface, how is neuronal activity (to fire or not to fire) determined?…
At a synapse, a neuron releases a chemical known as a neurotransmitter that excites or inhibits another cell (Kalat, 2004). Synapses can occur in one of three places: on dendrites, on the soma, and on other axons. It 's a form of communication between neurons. The messages are carried by neurotransmitters and then released be terminal buttons. Synapses are very critical for almost all aspects of…
Spencer SS. Seizures and epilepsy. In: Goldman L. Ausiello D, eds. Cecil Medicine. 23rd ed.…
"Epilepsy is a nervous system disorder that produces sudden, intense bursts of electrical activity in the brain. This abnormal electrical activity in the brain causes seizures, which may briefly upset a person 's muscle control, movement, speech, vision, or awareness."…
6. Trescher WH, Lesser RP. The Epilepsies. In: Bradley WG, Daroff RB, Fenichel GM, Jakovic J, eds. Neurology in Clinical Practice. 5th ed. Philadelphia, Pa; Butterworth-Heinemann; 2008: chap 71.…
Epilepsy is a neurological condition in which affects the nervous system and is also known as a seizure disorder. It is normally diagnosed after a person has had two or more seizures that weren 't caused by a known medical condition like extremely low blood sugar or alcohol withdrawal. The seizures in epilepsy may be related to a brain injury or a family tendency but most of the time it unfortunately unknown. “Epilepsy”, the word itself, does not indicate anything about the cause of the person 's seizures, what type they are or how severe they can or may be. Epilepsy is the condition of recurrent spontaneous seizures arising from abnormal electrical activity within the brain. Epileptogenesis…
excitation and inhibition must be present. Epilepsy can result from a birth defect, infection of…
A seizure is a sudden disruption of the brain's normal electrical activity accompanied by altered consciousness and/or other neurological and behavioral manifestations. Epilepsy is a condition characterized by recurrent seizures with symptoms that vary from a momentary lapse of attention to severe convulsions.…
Epilepsy is a group of related disorders characterized by a tendency for recurring seizures. There are different types of epilepsy and seizures. Epilepsy drugs are prescribed to control seizures, and rarely surgery is necessary if medications are ineffective. Epilepsy is a disorder of the brain's electrical system. Abnormal electrical impulses cause brief changes in movement, behavior, sensation, or awareness.…
How baseball pitchers hit the catcher’s glove every time is regulated by a motor control system which is paralleled by the retinal circuitry in our eyes. In the Asari and Meister paper, they were able to experimentally prove the functional role of amacrine cells in retinal dynamics. In this thought paper I will argue that together with the bipolar and ganglion cells, the amacrine cells operate in a parametric system similar to the feedback and feedforward systems found in motor control.…