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…
Introduction of the Temporalis muscle In anatomy, the temporalis muscle is also known as the temporal muscle. This muscle fills the temporal fossa. The temporalis muscle is a thin, fan-shaped muscle located within the temporal fossa of the skull. Along with the medial pterygoid muscle, lateral pterygoid, and masseter muscles, it belongs to the group…
Introduction The masseter is a quadrilateral muscle that covers the lateral surface of the ramus of the mandible. The masseter muscle fibres are arranged in three layers. The masseter muscle is a paired, strong, thick, and rectangular muscle that originates from the zygomatic arch and extends down to the mandibular angle. It contains a superficial…
Introduction The medial pterygoid is a thick, quadrilateral muscle of the face and it has a small superficial head and a large deep head which forms the major part of the muscle.The medial pterygoid muscle is supplied by the mandibular branch of the trigeminal nerve (V). It is important in mastication (chewing). It belongs to…
Introduction of the facial muscle The facial muscles, also known as craniofacial muscles, are a group of about 20 flat skeletal muscles lying under the skin of the face and scalp. Most facial muscles originate from the bones or fibrous structures of the skull and radiate to insert on the skin. Muscle of the Scalp…
Introduction The muscles of mastication move your mandible during mastication and speech. The muscles of mastication are the Masseter, the Temporalis, The Lateral pterygoid, and the medial pterygoid. They develop from the mesoderm of the first branchial arch and are supplied by the mandibular nerve which is the nerve of the branchial arch. The muscles…
What is meaning of the word Bell’s Palsy ?orDefinition of Bell’s Palsy : It is the condition defined as a : Sudden weakness in the facial muscles of half side of the face caused by dysfunction or affection of facial nerve. So it results in a inability to perform movement of muscles of affected side…
Anatomy of Zygomaticus Major Zygomaticus major shown in red. It is a muscle of facial expression which draws the angle of the mouth superiorly and posteriorly to allow one to smile. Origin: Anterior surface of zygomatic bone. Insertion: Modiolus at angle of mouth. Nerve supply: Buccal branch of facial nerve (VII). Blood supply: Superior labial…
Levator labii superioris alaeque nasi muscle Anatomy The levator labii superioris alaeque nasi muscle, often referred to as the levator labii superioris muscle, is a facial muscle located in the upper lip region. It plays a crucial role in facial expression and is part of the complex network of muscles responsible for controlling movements around…
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…
