#joint

• Arthresthesia — Loss or pronounced diminution of articular sensitivity, manifested by the patient's inability to perceive the position, movements, or spatial orientation of their own joints; articular anesthesia. In clinical neurology, it represents a profound disorder of the proprioceptive sense caused by lesions of the spinal cord's posterior columns or peripheral nerves.
• Arthro- — A scientific combining form used as a prefixoid in international medical, surgical, and biological terminology to indicate a structural connection with a joint or the body's articular system; represents the standard variant used before roots beginning with a consonant. It governs the formation of fundamental terms such as arthrosis, arthroplasty, or arthroscopy.
• Arthrocele — A hernia, cystic swelling, or abnormal dilation of a joint capsule, caused by the excessive accumulation of synovial fluid or through the structural weakening of periarticular tissues. In clinical practice, this cystic mass can compress adjacent nerves and blood vessels, generating discomfort, local pain, and partial reduction in the mobility of the affected bony segment.
• Arthrocentesis — An invasive medical procedure consisting of puncturing a joint cavity using a sterile needle, performed for diagnostic purposes (to extract and analyze synovial fluid) or therapeutic purposes (to evacuate a fluid effusion or inject medications). It is a fundamental technique in rheumatology and orthopedics for the rapid evaluation of septic or microcrystalline arthritis.
• Arthroclasia — A surgical operation or forced orthopedic maneuver consisting of breaking or destroying fibrous adhesions and vicious callus within an ankylosed joint, performed with the purpose of restoring its lost structural mobility. This invasive procedure is typically executed under general anesthesia to allow the sudden mobilization of blocked bony segments.
• Arthrodesis — Surgical intervention aimed at the permanent fixation of a movable joint through artificial bone fusion, designed to restore skeletal stability and eliminate severe chronic pain. This procedure permanently blocks movement in the treated segment, serving as a final therapeutic solution for advanced joint destruction caused by arthrosis, major trauma, or congenital deformities.
• Arthrodia — A type of synovial joint characterized by flat or nearly flat bony surfaces, permitting exclusively limited gliding movements of the skeletal segments, without rotation or major axial flexion. This anatomical connection, found for instance between carpal or tarsal bones, provides remarkable structural resistance and subtle flexibility, absorbing mechanical shocks during locomotion.
• Arthrodynia — A sensation of pain localized within a joint, manifesting without the presence of obvious structural changes, visible lesions, or acute inflammatory signs detectable during an objective clinical examination. This symptom is frequently encountered in the early stages of rheumatic diseases, chronic fatigue states, or as a secondary manifestation within systemic viral infections.
• Arthrophyte — A loose fragment of bone, cartilage, or synovial tissue detached within the cavity of a movable joint, acting as an intra-articular foreign body. Commonly referred to as a 'joint mouse', it typically originates from trauma, advanced degenerative processes, or osteochondritis dissecans, causing sharp pain, inflammation, and sudden locking of movement.
• Arthrogenic — Originating in the joints; generated or caused by a disease or dysfunction of the articular structures. Broadly, the term describes a symptom, pain, or locomotor dynamic disorder whose primary causes reside exclusively within the elements of the synovial capsule, cartilage, or stabilizing ligaments directly associated with the bone joint.
• Arthrography — A method of radiological or imaging examination of a joint, performed by previously injecting a contrast medium directly into the joint cavity. This procedure allows detailed visualization of radiolucent anatomical structures, such as cartilage, menisci, labrum, or internal ligaments, which cannot be precisely observed on a standard non-contrast X-ray.
• Arthrogram — The radiological image, film, or graphical record obtained following an arthrography, highlighting the internal anatomical details of a joint injected with a contrast medium. This visual medical record serves as an essential tool for identifying meniscal tears, hidden ligamentous ruptures, and deep cartilage defects that cannot be visualized via simple radiological techniques.
• 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.
• Arthrolith — A calcareous formation or mineralized calculus formed by the gradual accumulation and deposition of calcium salts inside a joint cavity or within the structure of the synovial capsule. This type of stony concretion, often secondary to chronic inflammatory processes or local metabolic disorders, acts as a foreign body that can cause constant mechanical irritation, hydrarthrosis, and progressive reduction of mobility.
• Arthrolysis — Surgical intervention consisting of the sectioning or destruction of fibrous adhesions, pathological scars, or retracted capsules within a joint, aiming to restore mobility lost due to ankylosis or prolonged immobilization. This joint release procedure can be performed either through a classic open approach or arthroscopically, and must be followed by an intensive functional rehabilitation program.
• Arthrology — A branch of anatomy and medicine dealing with the study of the structure, functions, development, and pathology of joints in human and animal bodies. This discipline analyzes all connecting elements between skeletal segments, including cartilage, synovial capsules, ligaments, and lubricating fluids, providing the theoretical foundation for orthopedics, rheumatology, and physical therapy.
• Arthromalacia — A degenerative pathological process characterized by the abnormal softening and loss of firm consistency of the articular cartilage or subchondral bone structures within a joint. This structural weakening, typically caused by metabolic disorders, chronic nutritional deficiencies, or persistent inflammation, reduces the joint's shock-absorbing capacity, leading to progressive deformities and severe pain.
• Arthromere — An anatomical segment or primitive development zone within an embryonic limb, directly involved in the formation of future joints and adjacent skeletal structures. In evolutionary biology and morphology, the term describes a repetitive structural unit or metamere of the limbs, acting as a genetic organizing center that coordinates the proper alignment of bones and synovial capsules during organogenesis.
• Arthromyodysplasia — A rare congenital condition characterized by the abnormal, defective, or incomplete development of joint structures combined with volume or structural anomalies of the adjacent muscle tissue. This complex dysplasia leads to severe stiffness, limb mobility limitations, and muscle hypotrophy from the neonatal stage, possessing a genetic determination or being secondary to prolonged fetal immobilization in the uterus.
• Arthropathy — A generic term used to designate any disease, suffering, or organic or functional condition that localizes within and affects a joint, regardless of its underlying cause. This extensive medical category includes destructive degenerative processes (such as arthrosis), inflammatory conditions (arthritis), or secondary joint disorders driven by systemic illnesses like diabetes or psoriasis.