Glossary M

Müller-Lyer illusion is defined as an illusion in which two (2) lines of equal length appear to be of different lengths because of the addition of "fins’’ to the ends of the lines.

Mullerian duct refers to one of a pair of tubes in the embryo that will develop, in female embryos, into the fallopian tubes, uterus, and part of the vagina.

Mullerian inhibiting factor (MIF) is defined as a hormone secreted in male embryos that prevents the Mullerian duct from developing into female reproductive organs.

Mulligrubs means grumpiness; colic; low spirits. Mulligrubs refers also to an ill-tempered person.

Multi-axial diagnostic system of the DSM-IV-TR refers to the system of five (5) Axes or mechanisms for gathering and recording data, currently in use by the mental health profession.
Multi-infarct Dementia is a Dementia caused by multiple small strokes or Ischemic attacks.
- Multi-Method Assessment Approach : Multi-Method Assessment Approach refers to a clinical assessment which emphasizes the importance of obtaining information from different informants or sources, in a variety of settings, using a variety of procedures that include interviews, observations, questionnaires, and tests.

Multi-modal treatment also called Multi-modal therapy is a combination of both medication and behavior modification.