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7 Μαρ 2024 · Anatomy, bony landmarks and function of the humerus. The deltoid tuberosity is a prominent rough triangular area located at approximately the mid-point of the lateral aspect of the shaft of the humerus. It serves as the distal attachment site for the deltoid muscle.
30 Οκτ 2023 · The deltoid muscle has a very broad origin and a narrow base, thus creating its triangular shape. The three parts of the deltoid each have a different origin: The clavicular (anterior) part originates from the superior surface and the anterior border of the lateral third of clavicle.
30 Ιαν 2024 · The deltoid distally attaches to the deltoid tuberosity of the humerus. Function. When the 3 parts of the deltoid contract simultaneously, the muscle can assist in abducting the arm past 15°. The deltoid cannot initiate abduction because it contracts parallel to the humeral axis.
The deltoid tuberosity (deltoid tubercle) is the rough, triangular prominence found at the middle third of the anterolateral surface of the humerus. It provides an insertion site for the deltoid muscle.
9 Οκτ 2022 · The deltoid is an intrinsic muscle of the shoulder region. It is shaped like an inverted triangle and can be divided into three parts (anterior, middle and posterior). Attachments: Originates from the lateral third of the clavicle, the acromion and the spine of the scapula.
An important function of the deltoid is the stabilisation of the shoulder joint preventing subluxation or even dislocation of the head of the humerus, particularly when carrying a load. Deltoid is the prime mover of shoulder abduction.
25 Οκτ 2024 · The deltoid has three distinct functions that correspond to the three bands of muscle fibers. Contraction of the anterior fibers flexes and medially rotates the arm by pulling the humerus towards the clavicle.
