Introduction The intercostal nerves originate in segments from the anterior/ventral rami of thoracic spinal nerves T1 to T11. The term ’intercostal’ mention to their course in the intercostal space, in which they run alongside intercostal vessels. The anterior rami of the most inferior thoracic spinal nerve (T12) give rise to the subcostal nerve which runs…
Introduction The lateral rectus muscle is one of the seven extraocular muscles. These muscles control every eye movement; generally, one muscle moves the eye in one direction, and the combination of all of them allows the eye to move in each direction. Extraocular muscles include 4 rectus muscles (medial, lateral, superior, and inferior rectus), 2…
Introduction The genitofemoral nerve is a branch of the lumbar plexus that contain fibers from the anterior rami of spinal nerves L1 and L2. The nerve arises in the substance of the psoas major muscle and descends retroperitoneally proceeding to the inguinal ligament. The genitofemoral nerve ends by giving off two terminal branches: the femoral…
Medial pectoral nerve The medial pectoral nerve, this is also known as the medial anterior thoracic nerve, is a branch of the medial cord of the brachial plexus. alongside originating, the nerve travels together with the axillary artery & vein, being located between them.The medial pectoral nerve is lonely a motor nerve. Its main function…
Introduction Ilioinguinal nerve The ilioinguinal nerve is also one of the branches of the lumbar plexus. It is a mixed type of nerve that rises as a continuation of the inferior branch of the anterior (ventral) ramus of spinal nerve L1. The function of the ilioinguinal nerve is to give the sensory supply to the…
List of nerves – There are 12 cranial nerves, and this list is further classified into a list of spinal nerves, a list of nerves that travels into the upper limb, lower limb, trunk, and organs. What are nerves? Nerves are like cables that conduct electrical impulses between the brain & the rest of the…
Overview The saphenous nerve is a sensory nerve that presents deep within the leg. It’s part of the peripheral nervous system, which helps the brain interpret, or “feel,” stimuli from the body & the environment. The function of the saphenous nerve the saphenous nerve is a sensory nerve that carries information about what the leg…
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….
