They are surrounded by a ring of sphincter muscles called the bulbocavernosus muscle. Cramps may occur in a skeletal muscle or smooth muscle. This prevents nerve impulses from triggering muscle contractions. Cardiomyocytes show striations similar to those on skeletal muscle cells. Body shape is influenced by the distribution of muscle and fat tissue. Potassium is essential for many body functions, including muscle and nerve activity. Physical therapy is helpful to patients with joint stiffness and low muscle tone. Myonecrosis is a condition of necrotic damage, specific to muscle tissue. Processes of tension such as stretching and relaxing increased differentiation into muscle cells. This muscle is the innermost abdominal muscle. They produce toxins that interfere with normal muscle contractions. Older adults are prone to loss of muscle strength. There are specific proteins expressed in cardiac muscle cells. Creatinine is the product of muscle creatine catabolism. All generally result in worsening muscle weakness associated with muscle twitching.