Definition: A hemispherectomy is a neurosurgical procedure in which one cerebral hemisphere (half of the brain) is either partially or completely removed or disconnected from the remaining brain tissue. Subtypes: There are two subtypes of hemispherectomy: Anatomical hemispherectomy: This involves the removal of one entire cerebral hemisphere. Functional hemispherectomy: Instead of removing the hemisphere, this […]
Hemisphere: A hemisphere is a half of a sphere, which is a three-dimensional geometric figure that is perfectly round and symmetrical. It is formed by rotating a semicircle around its diameter, resulting in two regions that are mirror images of each other. Types of Hemispheres: Northern Hemisphere: The half of the sphere that lies north
Hemispatial Neglect: Definition: Hemispatial neglect is a cognitive disorder characterized by a partial or total inability to attend, perceive, or respond to stimuli in one side of space, typically following injury or damage to the brain’s right hemisphere. Causes: Brain Injury: Hemispatial neglect is most commonly caused by a brain injury, particularly in the right
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Hemisection Of The Spinal Cord Hemisection of the spinal cord, also known as Brown-Séquard syndrome, is a medical condition characterized by damage or injury to one side (hemisection) of the spinal cord. It results in a combination of both sensory and motor deficits on the affected side of the body. Causes Hemisection of the spinal
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Hemiplegia Definition: Hemiplegia refers to a neurological condition characterized by paralysis or weakness on one side of the body. It is typically caused by damage to the brain, spinal cord, or nerves that control the affected side. Causes 1. Stroke: Hemiplegia is commonly caused by a stroke, which occurs when the blood supply to a
Hemiparaplegic Syndrome Hemiparaplegic syndrome is a complex neurological condition characterized by a combination of hemiplegia and paraplegia. Hemiplegia Hemiplegia refers to a partial or complete paralysis affecting one side of the body. It commonly affects either the right or left side, often including the arm, leg, and sometimes the face. This muscle weakness or loss
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Hemiballismus Definition: Hemiballismus refers to a rare movement disorder characterized by involuntary, brief, and violent flinging or throwing movements of a limb or limbs on one side of the body. These movements are typically unpredictable and can affect the arm, leg, or both, causing significant impairment in motor function. Symptoms: Hemiballismus is typically associated with
Hematophobia Definition: Hematophobia is a specific phobia characterized by an intense and irrational fear of blood or blood-related activities. Overview: Hematophobia, also known as the fear of blood, is considered a specific phobia, which falls under the category of anxiety disorders. Individuals with hematophobia experience extreme levels of anxiety or panic attacks when exposed to
Hematoma Definition: A hematoma refers to a localized collection of blood outside of blood vessels, usually in a tissue or organ, resulting from an injury or rupture of blood vessels. It occurs when blood accumulates and clots within the affected area, forming a solid or semi-solid mass. Causes of Hematoma: Several factors can contribute to
Definition: Hemangiectatic hypertrophy is a medical condition characterized by the abnormal enlargement and proliferation of blood vessels within an organ or tissue, resulting in localized swelling or hypertrophy. Causes: This condition can be caused by various factors, including: Genetic mutations: Some individuals may inherit genes that predispose them to hemangiectatic hypertrophy. Trauma: Injuries to the
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