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This angle is formed by the junction of the superior and medial borders of the scapula. The superior angle is located at the approximate level of the second thoracic vertebra. The superior angle of the scapula is thin, smooth, rounded, and inclined somewhat lateralward, and gives attachment to a few fibers of the levator scapulae muscle. [5]
The scapular line, also known as the linea scapularis, is a vertical line passing through the inferior angle of the scapula. [ 1 ] It has been used in the evaluation of brachial plexus birth palsy.
Scapular line: A vertical line passing through the inferior angle of the scapula. Paravertebral line: A vertical line corresponding to the tips of the transverse processes of the vertebrae. Posterior median line; Other anatomical lines include:
The fourth thoracic vertebra, together with the fifth, is at the same level as the sternal angle. The thoracic spinal nerve 4 (T4) passes inferior it. A thoracic spine X-ray of a 57-year-old male. Surface orientation of T3 and T7, at middle of spine of scapula and at inferior angle of the scapula, respectively.
Posterior aspect of the inferior angle of the scapula: Insertion: Medial lip of the intertubercular sulcus of the humerus: Artery: Subscapular and circumflex scapular arteries: Nerve: Lower subscapular nerve (segmental levels C5 and C6) Actions: Adduct the humerus, internal rotation (medial rotation) of the humerus, extend the humerus from ...
When the spine is fixed, levator scapulae elevates the scapula and rotates its inferior angle medially. [2] It often works in combination with other muscles like the rhomboids and pectoralis minor to produce downward rotation of the scapula.
The root of the spine of the scapula is the most medial part of the scapular spine. It is termed "triangular area of the spine of scapula", based on its triangular shape giving it distinguishable visible shape on x-ray images. [1] The root of the spine is on a level with the tip of the spinous process of the third thoracic vertebra. [2]
Orientation of vertebral column on surface. T3 is at level of medial part of spine of scapula. T7 is at inferior angle of the scapula. L4 is at highest point of iliac crest. S2 is at the level of posterior superior iliac spine. Furthermore, C7 is easily localized as a prominence at the lower part of the neck. [8]