ThePigSite Pig Health
Muscular System(20) There are three types of muscle in the pig:
- Involuntary or smooth muscle - Found in the digestive and genital systems and the blood vessel walls.
- Cardiac muscle - The heart consists largely of this muscle. It is involuntary.
- Voluntary or skeletal muscle - This is the main muscle mass forming the muscular-skeletal system. These muscles are attached to the surface membrane covering bones called the periosteum. Inflammation of this covering is called periostitis.
Asymmetric hind quarter syndrome - One hind leg muscle mass appears less than the other. It can arise where poor quality iron injections are given or it may be a congenital condition. It may be part of the porcine stress syndrome (PSS).
Back muscle necrosis - Sudden acute lameness and swellings of the lumber muscle often associated with PSS.
Congenital muscle hypertrophy - A breeding defect with excessive muscle formations.
Dark firm dry muscle (DFDM) - Describes the appearance of abnormal muscle at slaughter. Considered part of the PSS condition.
Mulberry heart disease (MHD) - Heart muscle failure associated with unavailability of vitamin E and or selenium.
Muscle necrosis - Dead muscle tissue. This can arise due to loss of blood supply caused by bacterial thrombosis (bacteria clogging up the blood vessels), physical damage or toxic damage. Iron toxicity, vitamin E or selenium deficiency are further examples.
Myodegeneration - Loss of function of muscle due to muscle fibres degenerating. Common problems are associated with deficiencies of vitamin E and or selenium.
Myopathy - This term describes any muscle disease.
Myositis - Inflammation of muscle often caused by trauma or infection.
Pale soft exudative muscle (PSE) - Describes the appearance of abnormal muscle at slaughter. Part of the PSS condition.
Pietrain creeper syndrome - Progressive muscle weakness in pigs from 3-12 weeks old. Considered to have a hereditary basis.
Porcine stress syndrome (PSS) - A heritable condition involving defective muscle metabolism.