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The pterygoid hamulus is part of the medial pterygoid plate of the sphenoid bone of the skull. Its tip is rounded off. [ 1 ] It has an average length of 7.2 mm, an average depth of 1.4 mm, and an average width of 2.3 mm. [ 1 ] The tendon of tensor veli palatini muscle glides around it.
The body or shaft of the humerus is triangular to cylindrical in cut section and is compressed anteroposteriorly. It has 3 surfaces, namely: Anterolateral surface: the area between the lateral border of the humerus to the line drawn as a continuation of the crest of the greater tubercle.
Hamate bone of the left hand. Hamulus shown in red. The hook of hamate (Latin: hamulus) is found at the proximal, ulnar side of the hamate bone. The hook is a curved, hook-like process that projects 1–2 mm distally and radially. [5] The ulnar nerve hooks around the hook of hamate as it crosses towards the medial side of hand.
Hamulus is the diminutive – hooklet or little hook. The plural is hamuli. Adjectives are hamate and hamulate, as in "a hamulate wing-coupling", in which the wings of certain insects in flight are joined by hooking hamuli on one wing into folds on a matching wing. Hamulate can also mean "having hamuli".
The pterygomandibular raphe (pterygomandibular fold [1] or pterygomandibular ligament) is a thin [2] tendinous band of buccopharyngeal fascia.It is attached superiorly to the pterygoid hamulus of the medial pterygoid plate, and inferiorly to the posterior end of the mylohyoid line of the mandible.
The lateral pterygoid plate of the sphenoid (or lateral lamina of pterygoid process) is broad, thin, and everted and forms the lateral part of a horseshoe like process that extends from the inferior aspect of the sphenoid bone, and serves as the origin of the lateral pterygoid muscle, which functions in allowing the mandible to move in a lateral and medial direction, or from side-to-side.
In the first year after birth the great wings and body unite, and the small wings extend inward above the anterior part of the body, and, meeting with each other in the middle line, form an elevated smooth surface, termed the jugum sphenoidale. By the twenty-fifth year the sphenoid and occipital are completely fused.
The center of the body is defined as the midsagittal or longitudinal plane. [3] These terms come from Latin words with similar meanings, ab-being the Latin prefix indicating ' away ', ad-indicating ' toward ', and ducere meaning ' to draw or pull '. [b] Abduction is a motion that pulls a structure or part away from the midline of the body ...