The sarcoplasmic reticulum is a membrane system of tubes located in the sarcoplasm of muscle fibers. It assists in the transport of substances within the cell and stores calcium ions, the release of which leads to muscle contraction. In various muscle diseases, this task performance is impaired, for example, in malignant hyperthermia or myofascial pain … Sarcoplasmic Reticulum: Structure, Function & Diseases
The geniohyoid muscle is one of the suprahyoid muscles that together open the jaw and participate in swallowing. The hypoglossal nerve is responsible for the nervous supply to the geniohyoid muscle. Accordingly, hypoglossal nerve palsy impairs the function of the muscle and causes dysphagia, which can occur in the context of numerous neurologic, muscular, and … Geniohyoid Muscle: Structure, Function & Diseases
As the external tongue muscle, the hyoglossus muscle is involved in swallowing, speaking, sucking, and chewing, pulling the tongue backward and downward. Functional limitations are often due to problems with the hypoglossal nerve, which supplies the muscle neuronally. What is the hyoglossus muscle? The hyoglossus muscle is one of a total of four external tongue … Hyoglossus Muscle: Structure, Function & Diseases
The infraspinatus muscle extends between the scapula, glenohumeral joint capsule, and greater humerus. It is part of the striated (skeletal) musculature and is important for external rotation, abduction, and adduction of the arm. As part of the rotator cuff, it can be damaged if the cuff ruptures. What is the infraspinatus muscle? A person normally … Infraspinatus Muscle: Structure, Function & Diseases
The latissimus dorsi muscle is a striated skeletal muscle of the secondary back musculature, which makes up the largest muscle in the human body. The tasks of the back muscle are adduction, internal rotation as well as retroversion of the arms. Damage to the thoracodorsal nerve can paralyze the muscle. What is dre latissimus dorsi … Latissimus Dorsi Muscle: Structure, Function & Diseases
Muscle fibrils are muscle fiber elements composed primarily of the proteins actin and myosin. These two proteins are the contractile elements of muscle that work together to implement muscle movement. In nemaline myopathy, the muscle fibrils change to a spindle shape, causing muscle weakness. What is a muscle fibril? Muscle fibers or muscle fiber cells … Muscle Fibrils: Structure, Function & Diseases
Excitation of the striated musculature An important feature of the striated muscles, precisely to distinguish them from the smooth muscles and the heart muscles, is that they are subject to our arbitrary control. ́Quergestreifte Muscles can be consciously tensed or relaxed by us. They are reached by motor nerve fibers, at the end of which … Excitation of the striated musculature | Striated Musculature
Definition of striated musculature Transverse striated muscle is the name given to a certain type of muscle tissue because under polarizing light (for example, a simple light microscope) it looks as if the individual muscle fiber cells have regular transverse striation. Normally, the term is used synonymously for skeletal musculature, since this type of tissue … Striated Musculature
In exercise science, 3 forms of muscle work are described. Concentric contraction is one of them. It plays an important role in the dynamics of the body. What is concentric crane contraction? Concentric contraction is defined as dynamic muscle work in which there is a change in the length of the muscle. Concentric contraction is … Concentric Crown Traction: Function, Tasks, Role & Diseases
Lysine is one of the essential amino acids. It participates in numerous important body functions. What is lysine? Lysine (Lys or K) is a proteinogenic essential amino acid. Since the human body is unable to produce lysine itself, it must obtain the basic amino acid from food. Lysine forms an important building block for various … Lysine: Function & Diseases
Pericytes are cells of the extracellular matrix and surround all capillaries with their contractile projections. In one major function, they perform dilatation and constriction of capillaries because capillary endothelia lack muscle cells and rely on external control of their lumen. In addition, pericytes perform important functions in the proliferation of endothelial cells in the formation … Pericyte: Structure, Function & Diseases
Maximum force is the highest possible force an organism can exert against resistance. It is influenced by internal factors, such as muscle composition, and external factors, such as time of day. When there are structural changes in the contractile components, maximum force is diminished. What is maximum strength? Maximum force is the highest possible force … Maximum Force: Function, Tasks, Role & Diseases
