Definition of Amyotrophic Lateral Sclerosis (ALS) Amyotrophic Lateral Sclerosis (ALS), also known as Lou Gehrig’s disease, is a progressive neurodegenerative disorder characterized by the degeneration and death of voluntary motor neurons in the brain and spinal cord. Causes and Pathology ALS is caused by a combination of genetic and environmental factors, although the exact cause […]
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Amyloids Amyloids are insoluble fibrous protein aggregates that accumulate in extracellular spaces in various tissues and organs. Formation of Amyloids Amyloids are formed when proteins undergo a conformational change, leading to the aggregation and accumulation of misfolded proteins. Structure of Amyloids Amyloids typically exhibit a cross-beta sheet structure, where individual protein molecules stack together to
Description: The Amygdala is a almond-shaped set of nuclei located deep within the medial temporal lobe of the brain. Anatomy: The Amygdala comprises several nuclei, with the two main clusters being the lateral nucleus and the central nucleus. Function: The Amygdala plays a crucial role in the processing and regulation of emotions, including fear, anxiety,
Definition of Amusia: Amusia, also known as tone deafness, is a neurologic disorder characterized by the inability to properly perceive or interpret musical sounds. Main Symptoms of Amusia: Poor Pitch Discrimination: Individuals with amusia often struggle to distinguish slight differences in pitch, making it difficult for them to recognize melodies or reproduce them accurately. Rhythm
Amsterdam Dwarfism Description: Amsterdam Dwarfism, also known as Perrault syndrome, is a rare genetic disorder characterized by severe growth abnormalities and intellectual disabilities. It is categorized as a form of primordial dwarfism, a group of conditions that stunt overall growth and development. This syndrome was first discovered in the Dutch town of Amsterdam, hence its
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Definition of Amputee Identity Disorder: Amputee Identity Disorder is a psychological condition characterized by a persistent and distressing desire to become an amputee or to have a limb amputated. Individuals with this disorder typically develop a strong identification with amputation and experience intense dissatisfaction with their own bodies. Subtypes of Amputee Identity Disorder: 1. Desire
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Type: Anatomical Structure Definition: The ampulla is a dilated portion of a tubular structure, typically found in the body. It can refer to various anatomical structures in different systems of the human body. Examples of Ampulla: Esophageal ampulla: A widening of the esophagus at its inferior end, just before it joins the stomach. Hepatopancreatic ampulla
Definition: The amplitude refers to the maximum displacement or distance from the equilibrium position in a periodic or oscillatory motion. Explanation: Amplitude is a key characteristic of a wave or vibrating system. It represents the maximum magnitude or size of the oscillation and is usually measured from the equilibrium position or the mean value of
Definition of Amphetamines Amphetamines are a class of synthetic psychoactive drugs that stimulate the central nervous system. They are chemically similar to the naturally occurring neurotransmitters called catecholamines, which include dopamine, norepinephrine, and epinephrine. Properties and Effects Amphetamines are powerful stimulants that increase alertness, attention, and energy levels. They work by enhancing the release and
Definition: Amphetamine is a central nervous system stimulant drug that affects chemicals in the brain and nerves that contribute to hyperactivity and impulse control. Uses: Amphetamine is primarily used in the treatment of attention deficit hyperactivity disorder (ADHD) and narcolepsy. Mechanism of Action: Amphetamine works by increasing the release and blocking the reuptake of certain
