Levator anguli oris originates from maxilla and is used while smiling. It elevates the angle of mouth.

Orbicularis oculi muscle closes the eyelids of humans.

Occipitalis muscle is innervated by the posterior auricular nerve.

The temporoparietalis muscle controls ear elevation.

Sarcoplasmic hypertrophy is due to increased muscle glycogen storage. 

Palmaris longus is not always present in many human bodies. It is absent in about 14% individuals. It is found in wrist and the absence of this muscle has no effect on the grip.

Acute muscle soreness is the pain felt in muscles during and immediately after strenuous physical exercise. It subsides after some time.

Sarcomere is the basic unit of striated muscle tissue. It is composed of long, fibrous proteins as filaments that slide past each other when a muscle contracts or relaxes.

Muscle weakness in LEMS is caused by auto-antibodies to voltage gated calcium channels at the presynaptic side of the neuromuscular junction.

Epimysium is the fibrous tissue envelope that surrounds the skeletal muscles.

Nebulette is a cardiac-specific isoform belonging to the nebulin family of proteins. It is found in the walls of heart.

Cachexia is a body wasting syndrome characterised by loss of weight, muscle atrophy, fatigue, weakness and significant loss of appetite in a person who is not actively trying to lose weight.

The main area involved in muscle memory is the cerebellum.

The strongest muscle is the quadriceps femoris, if strength refers to the force exerted by the muscle itself.

Rohmert's law states that the maximum force one's muscles can exert decreases exponentially from the time one begins to continuously exert the force. It is used to calculate the maximum holding time for a task.