Chondroglossus muscle: a muscle sometimes described as a part of the hyoglossus but is separated from it by fibers of the genioglossus, which pass to the side of the pharynx. Origin: lesser cornu and body of the hyoid bone. Insertion: intrinsic muscular fibers of the tongue. Nerve supply: hypoglossal nerve. Action: depresses the tongue (some…
The genioglossus muscle is a muscle of the tongue that plays a crucial role in various functions such as speech, swallowing, and breathing. The genioglossus is a bilateral tongue muscle that is in the part of the extrinsic muscles of the tongue. The palatoglossus, styloglossus, and hyoglossus (chondroglossus) are the additional extrinsic muscles of the…
Thyroarytenoid muscle is a broad, thin muscle that forms the body of the vocal fold and that supports the wall of the ventricle and its appendix. It functions to relax the vocal folds. It is part of the intrinsic musculature of the larynx and plays a crucial role in vocal production and control. origin :…
Arytenoid Muscle Anatomy Arytenoid muscle is a single muscle, that fills up the posterior concave surfaces of the arytenoid cartilages. The arytenoid muscle, also known as the interarytenoid muscle, is a composite intrinsic muscle of the larynx that is made up of two parts: an unpaired transverse arytenoid muscle and a bilaterally paired oblique arytenoid…
Cricothyroid muscle is the only tensor muscle of the larynx aiding with phonation. origin : Anterior and lateral cricoid cartilage . Insertion : Inferior cornu and lamina of the thyroid cartilage . Nerve : External branch of Superior laryngeal nerve (branch of the vagus nerve) . Actions : tension and elongation of the vocal folds…
Salpingopharyngeus Muscle Anatomy The salpingopharyngeus muscle is a thin and elongated muscle located in the pharyngeal region of the human body. It is a component of the pharyngeal constrictor muscle group, which is essential to swallowing. Origin: Insertion: Nerve: Blood Supply The pharyngeal branch of the ascending pharyngeal artery, the larger palatine artery, and the…
Stylopharyngeus Muscle Anatomy The stylopharyngeus muscle is a long, slender muscle located in the pharynx, which is the muscular tube connecting the nasal and oral cavities to the larynx and esophagus. The stylopharyngeus is a muscle in the head that stretches between the temporal styloid process and the pharynx. The stylopharyngeus is a long, slender…
Pronator Quadratus Muscle Anatomy The Pronator Quadratus muscle is a small, square-shaped muscle located in the forearm of the human arm. It plays a crucial role in forearm pronation, which is the rotational movement of the forearm that turns the palm of the hand downward or backward. Origin Insertion Nerve supply Actions The lateral side…
External abdominal oblique Muscle Anatomy The external abdominal oblique is a paired muscle located on the lateral sides of the abdominal wall. Along with the internal abdominal oblique and transversus abdominis, it comprises the lateral abdominal muscles. Origin The external abdominal oblique muscle originates from the external surfaces of ribs 5-12. The attaching fibers interdigitate…
Sternocleidomastoid Muscle Anatomy The sternocleidomastoid muscle is a two-headed long, bilateral muscle of the neck, and is the most visible cervical muscle. The main functions of the muscle are rotation of the neck to the opposite side and flexion of the neck. The muscle nerve supply is the accessory nerve. The muscle name sternocleidomastoid is…
