Gordana Sendic Depending on the location of the lesion, the affected patients suffer from additional disturbances of tear and saliva secretion, hearing or taste. A comprehensive collection of OSCE guides to common clinical procedures, including step-by-step images of key steps, video demonstrations and PDF mark schemes. The buccinator is located between the maxilla and mandible. – The procerus acts on its superior attachment to depress the medial ends of the eyebrows and wrinkle the skin over the glabella. Read more. The functions of the platysma depend on the part of the muscle that contracts. A collection of data interpretation guides to help you learn how to interpret various laboratory and radiology investigations. vestibular schwannoma) but in most cases a definite cause cannot be found (idiopathic facial nerve paralysis, also known as Bell’s palsy). This sphincter-like muscle is located around the circumference of the mouth. Anatomy Lecturer & Anatomy Lead at Geeky Medics. Three main muscles comprise this group, including nasalis, procerus, and the depressor septi nasi. The muscles of facial expression are located in the subcutaneous layer on the scalp, face, and neck: Occipitofrontalis: This muscle has two bellies (the thickest part of the muscle): The frontal belly originates from the epicranial aponeurosis (fibrous tendon) and inserts into the skin and subcutaneous tissues of the eyebrows and forehead. The facial muscles are positioned around facial openings (mouth, eye, nose and ear) or stretch across the skull and neck. Its blood supply comes from the inferior labial branch of facial artery and mental branch of maxillary artery. This is the largest of the nasal facial muscles that comprises of two main groups. Last's anatomy: Regional and applied. These muscles have a common embryonic origin – the 2nd pharyngeal arch. Since the auricular muscles are quite rudimentary, their function is mainly insignificant in humans. The orbicularis oris is innervated by the buccal and mandibular branches of the facial nerve (CN VII). To find out more, take a look at the dedicated article for the buccinator muscle. Damage to the facial nerve results in facial paralysis of the muscles of facial expression on the involved side. When they contract, the skin moves. The platysma receives nervous supply from the cervical branch of the facial nerve (CN VII), and blood supply from the submental branch of the facial artery, and suprascapular branch of the thyrocervical trunk. The function of the nasalis muscle involves compressing the nasal aperture with its transverse part, and dilating the nostrils with its alar part. The function of the orbicularis oculi depends on which part of the muscle contracts. Textbook of head and neck anatomy (4th ed.). The muscles of facial expression are located in the subcutaneous tissue, originating from bone or fascia, and inserting onto the skin. It courses almost vertically inferiorly towards the angle of the mouth to attach on the modiolus, while blending with several other facial muscles. Hiatt, J. L., & Gartner, L. P. (2010). Learning anatomy is a massive undertaking, and we're here to help you pass with flying colours. Its blood supply stems from the facial artery and the infraorbital branch of the maxillary artery. These sections include the orbital orbicularis, palpebral orbicularis and lacrimal orbicularis.¹. Upon contraction, the corrugator supercilii acts to pull the eyebrows medially and produces vertical wrinkles over the glabella, creating a facial expression of frowning. The facial muscles (or muscles of facial expression) are situated within the subcutaneous tissue and are responsible for the movements of skin folds, providing different facial expressions. By contracting, the muscles pull on the skin and exert their effects. A collection of interactive medical and surgical clinical case scenarios to put your diagnostic and management skills to the test. It arises from several origin points that may include the fascia of the parotid gland, fascia of the masseter and platysma muscles, and occasionally the zygomatic arch. It is composed of three parts: The orbicularis oculi receives innervation from the zygomatic and temporal branches of facial nerve (CN VII) and blood supply from branches of the maxillary, superficial temporal and facial arteries. It originates from the oblique line of mandible while being continuous with the labial part of the platysma. Grounded on academic literature and research, validated by experts, and trusted by more than 1 million users. Finally, the deep palpebral part pulls the eyelids and lacrimal papillae medially and dilates the lacrimal sac, while compressing the lacrimal gland and ducts. The nasalis is a small muscle found on each side of the dorsum of the nose. There are 11 of these muscles and their functions include: The majority of the mouth muscles are connected by a fibromuscular hub onto which their fibers insert. The muscles of the mouth, or buccolabial group of muscles, is a broad group of muscles that form a functional compound that controls the shape and movements of the mouth and lips. The levator anguli oris is a slender, sheet-like muscle that arises from the canine fossa of maxilla. Innervation of the zygomaticus minor is provided by the zygomatic and buccal branches of facial nerve (CN VII), while its vascular supply stems from the superior labial branch of facial artery. The inability to move facial muscles is a classic symptom of facial nerve paralysis. The facial muscles are supplied by the facial nerve (cranial nerve VII), with each nerve serving one side of the face. Although it is mostly in the neck and can be grouped with the neck muscles by location, it can be considered a muscle of facial expression due to its common nerve supply. The action of the levator labii superioris is to assist other buccolabial muscles to elevate and invert the upper lip, exposing the maxillary teeth and deepening the nasolabial lines. Some of the fibers pass into the lateral part of the upper lip and with levator labii superioris and orbicularis oris. The auricular muscles are thin, fan-shaped muscles that connect the auricle to the scalp, and move the auricle to a certain extent. The platysma is supplied by the facial nerve. It also contributes to keeping the bolus of food central in the oral cavity and preventing it from escaping into the oral vestibule. It originates from the upper part of the frontal process of the maxilla and passes inferolaterally, inserting on the perichondrium and the skin over the major alar cartilage of the nose. The facial muscles are a group of striated skeletal muscles supplied by the facial nerve (cranial nerve VII) that, among other things, control facial expression. Clinically Oriented Anatomy (7th ed.). The depressor labii inferioris is a short quadrangular muscle found in the chin region. The frontal part is supplied by the temporal branches, while the occipital part receives innervation from the posterior auricular branch of the facial nerve.