Magnetic resonance imaging: A way of visualizing
the interior of the body using magnetic and radiofrequency
Marrow: Tissue within bone that helps form
new blood cells.
Medial: Towards the midline or the opposite
Median nerve: A nerve that starts in the
shoulder area and then runs into the hand. it carries sensory
fibers to the thumb and first two fingers and motor nerves
to the upper arm and to the base of the thumb to enable flexion
of the fingers.
Medicare: Health care financing provided
for individuals over 65 and for those who are disabled, under
supervision of the Federal Government - also Health Care Financing
Administration (HCFA) and Centers for Medicare and Medicaid
Meninges: The various membranes that line
the spinal cord and brain.
Meningioma: A tumor that derives from that
line the spinal cord and brain.
Meningioma: A tumor that derives from the
membranes around the spinal cord or brain.
Meningitis: An infection in the spinal fluid
and in the membranes around the spinal cord and brain.
Metastatic: A tumor that spreads to various
locations within the body.
Microdiscectomy: The removal of lumbar disc
material under microscope magnification.
Microplates: Small titanium plates, used
to hold the bones in position after repair,colosure or fusion.
Modalities: Different types of physical therapy
treatment such as ultrasound, stretching and strengthening.
Modulus of elasticity: The degree to which
a structure can be net and returned to its previous shape.
Motor evoked potentials: Activation of the
movement system, which is induced with magnetic fields applied
over the surface of the brain.
Motor neurons: Nerve cells in the spinal
cord that operate muscles.
Motor units: Groups of muscle cells operated
by the branches of a single motor nerve cell.
MR Angiography: an image of the blood vessels,
obtained using MRI scanning without any requirement for injection
of contrast into the blood system.
MR Neurography: a method for imaging nerves
with specialized MRI scanning.
Multidisciplinary pain management: An approach
to pain management that involves psychology,psychiatry,anesthesia,
and nursing as a multi-specialty team.
Muscle spasm: Abnormal, prolonged tension
in a muscle group, typically causing pain.
Musculocutaneous nerve: A nerve originating
in the shoulder that activates the biceps muscle.
Musculoskeletal: Anything pertaining to the
bones, muscles, tendons and ligaments.
Myelin: A fatty material that surrounds and
insulates the nerve cells and allows them to conduct their
electrical signals optimally.
Myelogram: an X-ray and CT image of the spinal
cord and nerve roots, produced by injecting contrast dye into
the spinal fluid. Magnetic Resonance (MR) Myelograms do not
require any injections.
Myelomeningocele: A birth defect affecting
the spine, in which the spinal cord may be exposed through
Myelopathe: Symptoms that arise when the
spinal cord is compressed.