Axillary lines
Axillary Lines
Axillary lines are anatomical terms used to describe specific areas on the human body, particularly in the thoracic region. They are used as reference points in medical examinations and procedures.
Pronunciation
Axillary: /æksɪlɛri/ Lines: /laɪnz/
Etymology
The term "axillary" is derived from the Latin word "axilla" which means "armpit". The term "lines" is derived from the Old English word "line" which means "cord" or "series".
Description
The axillary lines are three vertical lines used as reference points in the thoracic region. They are:
- Anterior axillary line: This line runs vertically down from the anterior axillary fold where the pectoralis major muscle inserts.
- Mid-axillary line: This line runs vertically from the apex of the axilla and lies between the anterior and posterior axillary lines.
- Posterior axillary line: This line runs vertically down from the posterior axillary fold where the latissimus dorsi muscle inserts.
Related Terms
- Axilla: The underarm or armpit area.
- Thoracic region: The chest area of the body.
- Pectoralis major muscle: A thick, fan-shaped muscle situated at the chest (anterior) of the human body.
- Latissimus dorsi muscle: A large, flat muscle on the back that stretches to the sides, behind the arm, and is partly covered by the trapezius on the back near the midline.
See Also
External links
- Medical encyclopedia article on Axillary lines
- Wikipedia's article - Axillary lines
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