Magnetic resonance imaging (MRI)

Malaise

Lethargic feeling of general discomfort; out-of-sorts feeling.

Mallet finger

Rupture of the extensor tendon from the distal phalanx due to forceful flexion of the phalanx.

Marfan's syndrome

Inherited connective tissue disorder affecting many organs, but commonly resulting in the dilation and weakening of the thoracic aorta.

McBurney's point

A site one-third the distance between the anterior superior iliac spine (ASIS) and umbilicus that with deep palpation produces rebound tenderness indicating appendicitis.

Mechanosensitive

Sensitive to mechanical stimulation.

Medial collateral ligament (MCL)

The ligament that stabilizes the inside part of the knee.

Medial epicondylitis (golfer's elbow)

Pain caused by damage to the tendons that bend the wrist toward the palm.

Meniscus

Fibrocartilagenous disc found within a joint that serve to reduce joint stress.

Metatarsalgia

A condition involving general discomfort around the metatarsal heads.

Microtrauma

Injury to a small number of cells due to accumulative effects of repetitive forces.

Modalities

Monteggia's fracture

Ulnar fracture with an associated dislocation of the radial head.

Morton's neuroma

A pinched nerve that usually causes pain between the third and fourth toes.

Motion segment

Muscle spindle

Encapsulated receptor found in muscle tissue sensitive to stretch.

Muscular endurance

The ability of muscles to exert tension over an extended period.

Muscular power

The ability of muscles to produce force at a given time.

Musculoskeletal system

The complex system involving the body's muscles and skeleton, including the joints, ligaments, tendons, and nerves.

Muscular strength

The ability of muscles to produce force during a single maximal contraction.

Myositis

Inflammation of connective tissue within a muscle.

Myositis ossificans

Accumulation of mineral deposits within muscle tissue.

Myotome

A group of muscles primarily innervated by a single nerve root.