Introduction A triangular-shaped, flat bone at the front of the knee joint is the patella, also known as the kneecap. It serves as a point of attachment for the quadriceps muscle group, which is responsible for straightening the knee. The apex, one of several bony landmarks on the patella, is the pointed end of the…
Introduction The foot is a complicated structure that includes more than 26 bones, 30 joints, various ligaments, tendons, and muscles liable for our capacity to stand upstanding, supporting the heaviness of the whole body and giving the base to the system for bipedal stride. The hind, middle, and forefoot of the foot are the divisions…
What are nerves? Nervous system autonomic In your body, how many of these nerves are there? Nerves in the body Cranial nerves Spinal nerves How many nerves are there overall then? How is a nerve cell constructed? How do nerves function? Is length important? How are the nerves organized? What diseases and disorders affect the…
The extensor carpi radialis longus muscle is one of the forearm muscles that is located on the lateral (outer) side of the forearm. It originates from the lateral epicondyle of the humerus and the supinator crest of the ulna, and inserts onto the base of the second metacarpal bone. The main function of the extensor…
Description The abductor pollicis longus muscle is a muscle located in the forearm, on the lateral side of the forearm. It is one of the muscles responsible for the movement of the thumb, specifically for abducting (moving away from the hand) and extending the thumb. The abductor pollicis longus muscle originates from the posterior surface…
Description The supinator muscle is a short, thick muscle located in the posterior compartment of the forearm, just above the wrist. It runs from the lateral epicondyle of the humerus (the bony bump on the outer elbow) to the proximal end of the radius (the smaller of the two forearm bones). The main function of…
The deep muscles of the core are located underneath the more superficial muscles of the abdominal wall. These muscles play an important role in stabilizing the spine and pelvis during movement. The four main deep muscles of the core are: It’s important to note that these deep core muscles work together with the more superficial…
The eye is a complex organ that consists of several structures that work together to allow us to see. These structures include the cornea, iris, pupil, lens, retina, optic nerve, vitreous humor, sclera, choroid, and ciliary body. Understanding the structure of the eye can help us understand how we perceive light and visual information. Structure…
Introduction Tarsal bones are a group of seven small bones located in the ankle joint of the human body. They are responsible for supporting the weight of the body and facilitating movement. The tarsal bones include the talus, calcaneus, navicular, cuboid, and three cuneiform bones (medial, intermediate, and lateral). The talus bone is the highest…
Description The extensor indicis muscle is a narrow muscle located in the forearm, running parallel to the ulna bone. It arises from the posterior surface of the ulna and the interosseous membrane, which separates the radius and ulna bones. The muscle belly is located in the mid-forearm and inserts onto the index finger’s extensor expansion…
