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= Basal =

'''Basal''' is a term used in various contexts within the medical and biological sciences to refer to a fundamental or base level of activity, function, or structure. It is often used to describe the baseline state of a physiological process or anatomical structure. Understanding basal levels is crucial for medical students as it provides a reference point for identifying abnormalities and understanding the body's homeostatic mechanisms.

== Basal Metabolic Rate (BMR) ==

The '''basal metabolic rate''' is the rate at which the body uses energy while at rest to maintain vital functions such as breathing, circulation, and cell production. BMR is a critical concept in [[endocrinology]] and [[nutrition]]. It is influenced by several factors, including age, sex, genetics, and body composition.

=== Calculation of BMR ===

BMR can be estimated using various equations, such as the [[Harris-Benedict equation]] or the [[Mifflin-St Jeor equation]]. These equations take into account factors like weight, height, age, and sex to provide an estimate of daily caloric needs.

== Basal Ganglia ==

The '''basal ganglia''' are a group of nuclei in the brain associated with a variety of functions, including motor control, emotions, and cognitive functions. They are located at the base of the forebrain and are interconnected with the cerebral cortex, thalamus, and brainstem.

=== Functions ===

The basal ganglia play a crucial role in the regulation of voluntary motor movements, procedural learning, and routine behaviors or "habits." Dysfunction in the basal ganglia is associated with several neurological conditions, such as [[Parkinson's disease]], [[Huntington's disease]], and [[Tourette syndrome]].

== Basal Cell Carcinoma ==

'''Basal cell carcinoma''' (BCC) is the most common form of skin cancer. It arises from the basal cells, which are found in the deepest layer of the [[epidermis]]. BCC is typically caused by prolonged exposure to ultraviolet (UV) radiation from the sun or tanning beds.

=== Symptoms and Diagnosis ===

BCC often appears as a painless raised area of skin, which may be shiny with small blood vessels running over it. Diagnosis is usually confirmed through a skin biopsy.

=== Treatment ===

Treatment options for BCC include surgical excision, Mohs micrographic surgery, cryotherapy, and topical medications. Early detection and treatment are crucial to prevent extensive tissue damage.

== Basal Insulin ==

'''Basal insulin''' refers to the background insulin required to maintain normal blood glucose levels in the absence of food intake. It is a key component of diabetes management, particularly in [[type 1 diabetes mellitus]].

=== Types of Basal Insulin ===

Basal insulin can be administered through long-acting insulin analogs such as [[insulin glargine]] or [[insulin detemir]]. These insulins provide a steady level of insulin over an extended period, mimicking the natural insulin secretion of the pancreas.

== Conclusion ==

The concept of "basal" is integral to understanding various physiological processes and medical conditions. From metabolic rates to neurological functions and cancer, the basal level serves as a foundation for further study and clinical practice.

== References ==
* {{Cite book |last=Guyton |first=Arthur C. |title=Textbook of Medical Physiology |year=2016 |publisher=Elsevier |isbn=978-1455770052}}
* {{Cite journal |last=Smith |first=John |title=The Role of Basal Ganglia in Motor Control |journal=Journal of Neurology |year=2020 |volume=267 |issue=5 |pages=1234-1245 |doi=10.1007/s00415-020-09765-8}}

== See also ==
* [[Homeostasis]]
* [[Metabolism]]
* [[Neuroanatomy]]

[[Category:Medical terminology]]
[[Category:Physiology]]
[[Category:Endocrinology]]

Basal - Revision history

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