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It is a neural mechanism that plays a role in encoding of new information. Encoding takes place as a result of changes in the strength of synapses among neurons in neuronal networks that process and store information. This change occurs when one or more axons connected to some dendrite bombard it with a brief but rapid series of stimuli-such as 100 synaptic excitations per second for 1to 4 seconds. The burst of intense stimulation leaves the synapses potentiated (more responsive to new input of the same type) for minutes, days or weeks. This phenomenon is termed as long term potentiation. It occurs in many brain areas and is particularly prominent in hippocampus.
The chemicals involved in LTP are glutamate and its receptors - NMDA and AMPA. A wide variety of drugs that interfere with LTP also blocks encoding process whereas drugs that facilitate LTP enhance the process.
M-Mode was the earliest form of cardiac ultrasound used clinically. It displays the amplitude signals of various structures along the length of ultrasound beam with distance or
The condition in which there is a DECREASE in the number of white blood cells in humans is termed as: a) Leukocytosis (pron: lew-kO-sigh-toe-sis) b) Leukopenia (pron: lew-kO
Undescended Testes (Cryptorchidism) Undescended testes is a ccmmon disorder. It may be unilateral and may be classified as ectopic cryptorchidism, when the testes are normal
What benefits led to natural selection of a two-circuit pump function of the heart a) One circuit to go from the heart to the body and one from the heart to the lungs b) One cir
Are protozoans presenting contractile, or pulsatile, vacuoles easily found in fresh or in salt water? Fresh water is the less concentrated of solutes than sea water and it (fre
What are the so-called "good" and "bad" cholesterol? Lipoproteins are complexes made of lipids (triglycerides and cholesterol) and proteins. The lipoproteins present dissimilar
Explain the Minimum Requirement of nutritional needs? Minimum nutrient requirement is defined as the 'lowest amount of the nutrient ji-om the diet that will prevent clinically
Describe Class Holothuroidea in details? Members of this Class resemble soft and squishy cucumbers lying on their sides on the bottom of the sea. On first glance, they appear n
Q. Counselling of PACE programme? Counselling is a key component of a PACE programme. Counselling is a process that enables a person to identify problems and find a solution or
In this unit, you have learnt that heart is a muscular organ situated in thorax covering with pericardium and consist of four chambers i.e. right atrium, left atrium, right ventric
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