X-Nico

5 unusual facts about Muscle contraction


Articulatory phonetics

A situation can be considered where (1) the vocal fold valve is closed separating the supraglottal cavity from the subglottal cavity, (2) the mouth is open and, therefore, supraglottal air pressure is equal to atmospheric pressure, and (3) the lungs are contracted resulting in a subglottal pressure that has increased to a pressure that is greater than atmospheric pressure.

Biological pacemaker

The heart is endowed with specialized excitatory and conducting cells that are responsible for the generation and conduction of rhythmic impulses and contractions throughout the heart.

Myogenic contraction

The resulting influx of Ca2+ ions lead to the initiation of excitation-contraction coupling and thus contraction of the myocyte.

Myogenic contraction refers to a contraction initiated by the myocyte cell itself instead of an outside occurrence or stimulus such as nerve innervation.

Orgastic potency

Reich argued that if repression occurred, this energy, in the form of stored emotions or affects, was held back by muscular contraction or armor, which restricts and immobilises the body and becomes the somatic core of neuroses, making full orgastic discharge impossible.


New Forest pony

DNA sequencing revealed that the affected foal was homozygous for a missense mutation in the gene encoding CLCN1, a protein which regulates the excitability of the skeletal muscle.


see also

Force spectroscopy

In this way a great deal has been learned in recent years about the mechanochemical coupling in the enzymes responsible for muscle contraction, transport in the cell, energy generation (F1-ATPase), DNA replication and transcription (polymerases), DNA unknotting and unwinding (topoisomerases and helicases), and so on.

Galvin

Galvanism, a muscle contraction stimulated by an electrical current

MYL9

The protein encoded by this gene is a myosin light chain that may regulate muscle contraction by modulating the ATPase activity of myosin heads.

Vertebral subluxation

The vertebral subluxation has been described as a syndrome with signs and symptoms which include: altered alignment; aberrant motion; palpable soft tissue changes; localized/referred pain; muscle contraction or imbalance; altered physiological function; reversible with adjustment/manipulation; focal tenderness.