Semispinalis Capitus
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Semispinalis Capitus

Introduction Semispinalis Capitus belongs to the semispinalis group of the muscle, which in turn is part of the Transversospinal group of muscles (It is formed of muscles between a spinous process and the transverse process of the vertebrae below). The semispinalis muscles have the longest fascicles of the transversospinalis group of the muscles, spanning six…

Sternohyoid muscle
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Sternohyoid muscle

Introduction The sternohyoid muscle is a flat muscle located on both sides of the neck.The sternohyoid muscle is a strap-like infrahyoid muscle that connects the hyoid bone with the clavicle and sternum. Along with the omohyoid muscle, it comprises the superficial plane of infrahyoid muscles, while the sternothyroid and thyrohyoid muscles belong to the deep…

Spinalis Cervicis
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Spinalis Cervicis

Introduction of the Spinalis Cervicis The Spinalis group of the muscle is part of the erector spinae (ES) group (the intermediate layer of the intrinsic back muscles). Spinalis Cervicis muscle is the cervical portion of the spinalis muscle with spinalis capitis muscle superiorly and spinalis thoracis muscle inferiorly.The Spinalis Cervicis muscle is variably present. Origin:…

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Suprahyoid muscles

Introduction of the suprahyoid muscles The suprahyoid muscles are the digastric, the stylohyoid, the mylohyoid, and the geniohyoid. They all are pharyngeal muscles, with the exception of the geniohyoid muscle.They are described below. The digastric muscle The digastric muscle lies below the body of the mandible, and extends, in a curved form, from the mastoid…

Mylohyoid muscle
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Mylohyoid muscle

Introduction The mylohyoid muscle is one of the suprahyoid muscles.The mylohyoid muscle is a flat, triangular muscle lying deep in the anterior belly of the digastric. Both the sides of the mylohyoid muscles together form the floor of the mouth. Along with the other suprahyoid muscles (the digastric, the geniohyoid, and the stylohyoid), The mylohyoid…

Lateral pterygoid Muscle
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Lateral pterygoid Muscle

Introduction The lateral pterygoid muscle has two heads the upper head and the lower head.The lateral pterygoid is the fan-shaped muscle located laterally in the infratemporal fossa of the skull. It is one of the four mastication muscles, along with the medial pterygoid muscle, temporalis, and masseter muscles. All these mastication muscles act upon the…