![]() ![]() It is more common in young adults between 20 and 40 years old. Slightly more women than men may develop this syndrome. Pregnancy - as joints loosen during pregnancy, signs of thoracic outlet syndrome can appear.Pressure on joints - obesity and carrying an oversized bag or backpack can put an undue amount of stress on joints. ![]() Anatomical defects - how your body is formed at birth may include an extra rib located above the first rib or an abnormally tight fibrous band that connects the spine to the rib.Trauma - Trauma, such as from a car accident.Poor posture - drooping shoulders or holding the head in a forward position.The cause of the compression can vary but include: What are the general causes of thoracic outlet syndrome? Back to top Examples of occupations that are at risk of this syndrome can include dental hygienists, typing on a computer, working on an assembly line, or lifting items above your head. Repetitive injuries from sports-related activities can also be a cause of this syndrome. Weak shoulder muscles, long necks and sloped shoulders, poor posture and obesity may contribute to thoracic outlet syndrome. When swollen or inflamed, they can compress the nerves and blood vessels between the neck and shoulders. Work activities involving prolonged restricted postures, such as carrying heavy shoulder loads, pulling shoulders back and down, or reaching above shoulder level, can cause inflammation and swelling of tendons and muscles in the shoulders and upper arms. What are the occupational factors of thoracic outlet syndrome? Back to top Nonspecific-type thoracic outlet syndrome - people with this syndrome have chronic pain in the area of the thoracic outlet that worsens with activity, but a specific cause of the pain cannot be determined.Vascular thoracic outlet syndrome - occurs when one or more of the blood vessels (veins or arteries) under the collarbone are compressed.The brachial plexus is a group of nerves that come from the spinal cord and control muscle movements and sensations in the shoulder, arm, and hand. Neurogenic (neurological) thoracic outlet syndrome - occurs when the brachial plexus is compressed.Types of thoracic outlet syndrome include: Thoracic outlet syndrome (TOS) is the general term used to describe a condition caused when the nerves and blood vessels below your neck (between the collarbone and the first rib) are compressed. What is thoracic outlet syndrome? Back to top
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