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8 08, 2018

Muscular Disorders

By Dr. Joseph H Volker | 2018-08-30T10:56:31+00:00 August 8th, 2018|Muscular System, Physiology|0 Comments

Cramps involve involuntary, painful tetany. The precise cause is unknown, but a cramp seems to result from chemical changes in the muscle, such as ionic imbalances or ATP deficiencies. Sometimes a severe blow to a muscle can produce a cramp.   Fibrosis (fi-bro'-sis) is an abnormal increase of connective tissue in a muscle. Usually, it [...]

8 08, 2018

Muscle Tissue And Types of Muscle Tissue

By Dr. Joseph H Volker | 2018-08-30T10:29:04+00:00 August 8th, 2018|Muscular System, Physiology|0 Comments

MUSCLE TISSUE is the only tissue in the body that is specialised for contraction (shortening). The body contains three types of muscle tissue: skeletal, smooth, and cardiac. Each type of muscle tissue exhibits unique structural and functional characteristics. Contraction of skeletal muscle tissue produces locomotion, movement of body parts, and movement of the skin, as [...]

8 08, 2018

Structure of Skeletal Muscle

By Dr. Joseph H Volker | 2018-08-30T10:34:15+00:00 August 8th, 2018|Muscular System, Physiology|0 Comments

Skeletal muscles are the organs of the muscular system. They are called skeletal muscles because most of them are attached to bones. A skeletal muscle is composed mainly of skeletal muscle tissue bound together and electrically insulated by connective tissue layers. Individual skeletal muscle cells, called muscle fibers due to their long skinny shape, are [...]

8 08, 2018

Physiology of Skeletal Muscle Contraction

By Dr. Joseph H Volker | 2018-08-30T10:41:41+00:00 August 8th, 2018|Muscular System, Physiology|0 Comments

Contraction of a muscle fiber is a complex process that involves a number of rapid structural and chemical changes within the muscle fiber. The molecular mechanism of contraction is explained by the sliding-filament model. Mechanism of Contraction In order for a muscle fiber to contract it needs to first be stimulated or "excited" by a [...]

8 08, 2018

Actions of Skeletal Muscles – Origin, Insertion and Muscle Interactions

By Dr. Joseph H Volker | 2018-08-30T10:44:22+00:00 August 8th, 2018|Muscular System, Physiology|0 Comments

The arrangement of the Skeletal muscles is such that the muscle ends are attached to bones on each side of a joint therefore, generally the muscle covers the joint. The muscle movement rely on the place of the muscle attachments and the type of the joint it is attached to.   Origin and Insertion During [...]

8 08, 2018

Major Skeletal Muscles

By Dr. Joseph H Volker | 2018-08-30T10:55:38+00:00 August 8th, 2018|Muscular System, Physiology|0 Comments

There are more than 600 muscles in the body, but only a few of the major muscles are considered here. Muscles of Facial Expression And Mastication Muscles of the face and scalp produce the facial expressions that help communicate feelings, such as anger, sadness, happiness, fear, disgust, pain, and surprise. Most have origins on skull [...]