Introduction The zygomaticus major muscle is also a muscle of the human body. It extends from each of the zygomatic arch (cheekbone) to the corners of the mouth. It is a muscle of facial expression which marks the angle of the mouth superiorly and also posteriorly to allow one to smile. The bifid zygomaticus major…
Introduction The zygomatic nerve is the branch of the maxillary nerve, which by itself is a branch of the trigeminal nerve (CN V). It runs from the orbit & splits into the zygomaticotemporal & the zygomaticofacial nerve. It gives sensory supply to the skin over the zygomatic bone & the temporal bone. either It also…
Introduction The depressor labii inferioris is a facial muscle that permits you to pull your lower lip down or to the side. While this muscle has very limited action on its own, it plays an important role in the complex structure of facial muscles that allow us to make such detailed and specific facial expressions….
Introduction The levator labii superioris muscles, also known as the quadratus labii, contribute to facial expression and action of the mouth and upper lip. It courses alongside the lateral aspect of the nose, and its preliminary function is the elevation of the upper lip. It is also implicated in movements such as expressions of disgust,…
Introduction Depressor anguli oris muscles is a paired triangular muscle that expands from the mental tubercle of the mandible to the angle of the mouth. It belongs to the buccolabial group of facial muscles also with levator labii superioris alaeque nasi, levator labii superioris, zygomaticus major, zygomaticus minor, levator anguli oris, risorius, depressor labii inferioris…
Definition/Description The intervertebral disc (IVD) is important in the usual or typical functioning of the spine or vertebrae. It is a cushion of fibrocartilage and the main joint between two vertebrae in the spinal column. There are 23 discs in the human spine: 6 in the cervical region (neck), 12 in the thoracic region (middle…
Description Sacral plexus with Pudendal nerveThe term ‘Pudendal’ comes from the Latin pudenda, meaning “external genitals”, derived from pudendum, meaning “parts to be ashamed of”. The pudendal nerve is the main nerve of the perineum, pelvic floor muscles & external genitalia. Benjamin Alcock first described it in 1836 while researching the internal pudendal artery’s path…
Introduction A muscle of facial expression, the levator anguli oris, helps to elevate both corners of the mouth. Along with the zygomaticus major and minor, the levator labii superioris, and the levator labii superioris alaeque nasi, it is accountable for providing upper dental show, primarily during smiling, and for sustaining the resting tone and position…
Introduction The tensor tympani is tiny, but the long paired muscles of the middle ear. Concurrently with the stapedius, it belongs to the group of intratympanic muscles. Tensor tympani regales a bony canal encountered superior to the osseous part of the auditory tube (pharyngotympanic tube; Eustachian tube). Its attachment to the malleus, one of the…
Introdution of Superior tarsal The superior tarsal muscle is a smooth muscle bordering the levator palpebrae superioris muscle that permits to raise of the upper eyelid. Not to be mistaken with the orbitalis muscle or the circular fibres of the ciliary muscle, both of which are also known as Müller’s muscle. The superior tarsal (Muller’s…
