Muscle deterioration occurs due to the death of muscle cells and muscle tissues, resulting in a genetic disease called muscular dystrophy, according to Medical News Today. The disease causes progressive weakness and degeneration of voluntary muscles.Know More
People with muscular dystrophy experience ongoing muscle wasting and muscle weakness, states Medical News Today. It worsens over time, causing disability and difficulty in walking that require leg and hand braces. Eventually, the patient needs to use a wheelchair. Muscle weakness typically starts in the legs, making it difficult for a person to walk normally or causing him to walk with widely distanced feet to maintain balance. Frequent falls, pain in the calves and limited range of motion are common in people with muscular dystrophy.
Medical News Today reports that some forms of muscular dystrophy manifest during childhood, while others do not appear until middle age or later. The most common type of muscular dystrophy is Duchenne MD, which mainly affects boys and occurs due to the absence of the dystrophin, a protein that helps maintain muscle integrity. It starts between 3 and 5 years of age and progresses quickly. Most boys with this disorder cannot walk by age 12 and require a wheelchair. They also typically need a respirator later in life.Learn more about Muscles
An arm lump can be caused by one of a variety of conditions, including inflammation, infection, trauma or tumor growth, according to Healthgrades. Lumps can be described as nodules, bumps, tumors, cysts or contusions and may be firm, painful, soft or painless.Full Answer >
Muscles are composed of muscle tissues and muscle cells. The cells found in muscles are highly specialized contractile cells. Muscles may be classified as skeletal muscle, cardiac muscle or smooth muscle, depending on the type of cells found in each muscle.Full Answer >
Springfield Technical Community College states that monosynaptic reflex is when a sensory neuron synapses, or a nerve impulse is transmitted, directly to a motor neuron, resulting in an automatic reflex. A polysynaptic reflex is when there are more than two synapses that connect the sensory neuron to the motor neuron.Full Answer >
An individual muscle fiber may also be called a myofiber or a muscle cell. Each muscle fiber is a single, narrow cell that spans the entire length of a muscle. There are three different kinds of myofibers found in the body: skeletal, cardiac and smooth.Full Answer >