#joint stiffness

• Amyoplasia — A specific and most common form of arthrogryposis multiplex congenita, characterized by the defective muscular development or congenital absence of certain skeletal muscle groups, which are structurally replaced by fatty and fibrous tissue. This severe condition causes joint stiffness, symmetrical limb contractures, and reduced mobility from birth, typically without affecting the patient's intellectual development.
• Ankylosis — A marked diminution or complete loss of mobility in a joint, occurring due to an intracapsular bony or fibrous fusion, caused by chronic inflammatory processes (rheumatism, arthritis), infections, severe trauma, or prolonged immobilization in bed or a plaster cast.
• Arthrogryposis — A rare congenital condition characterized by the presence of multiple and fixed joint contractures, manifested by stiffness and severe limitation of mobility from birth. This non-progressive pathology, often associated with hypotrophy of the surrounding muscles, typically affects multiple body segments symmetrically and is caused by reduced intrauterine fetal movement during embryonic development.