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The human musculoskeletal system (also known as the human locomotor system, and previously the activity system) is an organ system that gives humans the ability to move using their muscular and skeletal systems. The musculoskeletal system provides form, support, stability, and movement to the body.
The muscular system is an organ system consisting of skeletal, smooth, and cardiac muscle. It permits movement of the body, maintains posture, and circulates blood throughout the body. [ 1 ] The muscular systems in vertebrates are controlled through the nervous system although some muscles (such as the cardiac muscle ) can be completely autonomous.
Muscular, spinal and neural factors all affect muscle building. Sometimes a person may notice an increase in strength in a given muscle even though only its opposite has been subject to exercise, such as when a bodybuilder finds her left biceps stronger after completing a regimen focusing only on the right biceps.
Muscle cells are grouped into muscle fascicles by enveloping perimysium connective tissue. [1] Fascicles are bundled together by epimysium connective tissue. [1] Muscle fascicles typically only contain one type of muscle cell (either type I fibres or type II fibres), but can contain a mixture of both types.
Justo Gonzalo Rodríguez-Leal (1910–1986) Justo Gonzalo y Rodríguez-Leal (March 2, 1910 – September 28, 1986), was a Spanish neuroscientist who was born in Barcelona and died in Madrid.
The somatic nervous system controls all voluntary muscular systems within the body, and the process of voluntary reflex arcs. [ 10 ] The basic route of nerve signals within the efferent somatic nervous system involves a sequence that begins in the upper cell bodies of motor neurons ( upper motor neurons ) within the precentral gyrus (which ...
Superficial muscular aponeurotic system (or superficial musculoaponeurotic system [1]) (SMAS) is a thin yet tough [2]: 438 unitary tissue plane of the face [3] formed by facial fasciae, subcutis connective tissue, and facial muscles.
José del Castillo and Bernard Katz used ionophoresis to determine the location and density of nicotinic acetylcholine receptors (nAChRs) at the neuromuscular junction. With this technique, a microelectrode was placed inside the motor endplate of the muscle fiber, and a micropipette filled with acetylcholine (ACh) was placed directly in front ...