PatientCrossroads CMD


Glossary of Terms Related to Congenital Muscle Disease

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Term Definition

Cardiomyopathy is a group of chronic disorders affecting the muscle of the heart resulting in impairment of the pumping function of the heart.

CGH Array

A method of examining regions of DNA to identify extra or missing pieces of chromosomal material ranging in size from a whole chromosome to a tiny piece. Targeted CGH arrays can be used to test for deletions and duplications within the CMD gene.


Cognition is the process of knowing and, more precisely, the process of being aware, knowing, thinking, learning and judging. Some types of CMD do not affect cognition, other types of CMD may impair cognitive abilities.

Composite Motor Skills

A way of measuring several different types of motor skills, such as handwriting and eating, and putting these measurements together to see how various aspects of a person’s motor skills are doing overall.


Present at birth.

Continuous Positive Airway Pressure (CPAP)

One of the most commonly used forms of noninvasive ventilation, CPAP increases the pressure of the air in the lungs for the whole time someone is using the machine. This is helpful for people who have weak airways that get too small at times (as with obstructive sleep apnea).


A tightness in the muscles or tendons around a joint, which prevents the joint from moving the full amount. For example, a contracture in the knee can prevent the knee from straightening out or bending completely.

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