As the occipital bone connects with the firstvertebra(atlas), it forms theatlantooccipitaljoint. This junction helps you tonod and shake your head. The atlas is also the direct link between the spine and the skull. It also plays a part in your ability to see and interact with the world around you. As you get older, your occipital bones will fuse to the other bones of your skull. This opening allows for the passage of the spinal cord....
The optic nerve has been studied heavily because it is a direct extension of the brain. The nerve head appears as a white circular structure in the back of the eye. There are no photoreceptors on this structure. Verywell / Cindy Chung As a result, humans have a natural blind spot. As the fibers pass through, they become covered with a throw in of insulation called myelin. The nerve fibers become insulated with glial cells known as oligodendrocytes....
Much like a comma lying on its side, the pancreas extends slightly upward, becoming narrower and narrower. The pancreas is roughly the length of the handabout six inches long. Two types of gland comprise the pancreas, each with very different but vital functions. magicmine / Getty Images Theexocrine gland, which runs the entire length of the pancreas, secretes digestive enzymes. Theendocrineportion of the pancreas is made up of groups of cells call the islets of Langerhans....
The muscle runs down the lateral side of your lower leg and attaches to your foot. Peroneus longus pain can cause difficulties with daily activities, including those that involve walking or running. The nerve supply to the peroneus longus is through thesuperficial peroneal nerve. MedicalRF.com / Getty images The nerve comes from lumbar level five and sacral levels one and two. The blood supply to the peroneus longus comes from the anterior tibial and peroneal arteries....
Known as the master gland, the pituitary gland is behind the bridge of the nose. This being the case, its essential to numerous functions as well as overall health. Given its critical role, diseases or malformations of the pituitary gland can have serious implications. Ariel Skelley / Getty Images Each of these lobes has sub-parts and structures. This butterfly-shaped, unpaired bone is located towards the front of the skull at about eye level....
The brainstem is made up of three sections, and carries vital information to the body. The pons relays information about motor function, sensation, eye movement, hearing, taste, and more. What Is the Function of the Pons? The main functions of the pons deal with sensation and motor function, especially for the head and neck. Four of the body’s12 cranial nervesare in the pons, as well as the reticular activating system....
Thecoronary arteriesrun along the surface of theheartand supply the heart muscle with blood. Like the other coronary arteries, the posterior descending artery can be affected bycoronary artery disease. Several large coronary artery branches arise from this crown, supplying blood to different portions of the heart. krisanapong detraphiphat / Getty Images Anatomical Variations Coronary artery anatomy varies a great deal from person to person. The posterior descending artery arises near the crux cordis, where the atrioventricular groove meets the posterior interventricular sulcus....
Their job is to carry low-oxygen blood from the heart to the lungs. There, the blood is enriched with oxygen (oxygenation), andexcess carbon dioxideis removed. The blood is then pumped back into the heart via the pulmonary veins. MedicalRF.com / MedicalRF.com / Getty Images This article will go over what the pulmonary arteries are and their function. It also covers medical conditions linked to the pulmonary arteries. The left and right pulmonary arteries send blood to the left and right lungs, respectively....
The radius and ulna pivot around one another to allow rotation of the wrist. Together, along with the humerus, they create the elbow joint. The ulna is longer than the radius by about an inch in most people, but lengths vary considerably. Westend61 / Getty Images Of the two forearm bones, the radius is more likely to suffer afracturethan the ulna. Radius fractures are also very common in adults. A long bone is a dense, strong bone characterized as being longer than it is wide....
It branches from thevagus nerve(cranial nerve 10) but follows an unusual pathway to reach the larynx. The paired nerves don’t follow the same symmetrical course. The RLN supplies motor and sensory function to the voicebox. bymuratdeniz / Getty Images Location and How It Works There are 12cranial nervesin the human body. Many of the nerves support function in the face and throat, as does the recurrent laryngeal nerve. The recurrent laryngeal nerve serves both motor and sensory functions....
The retina is a thin layer of tissue that lines the very back of the inside of the eyeball. A number of diseases can affect the retina, including cancer. If any part of the retina becomes damaged, your vision may be compromised. UHB Trust The optic nerve transports these signals to the brain, where the perception of the images occurs. Associated Conditions There are many types of conditions that can affect the retina....
“Winging” of the scapula can lead to changes in how muscles support the shoulder. The muscles of the scapula each have a specific function and provide mobility. It is a major focus ofphysical therapy for shoulder paindue to illness, injury, or nerve damage. A winged scapula is usually visible because the shoulder bone and angle change and the shoulders appear uneven. Bone changes also may be at work.Less often, the rhomboid muscles may be the reason....
The scrotum is the sac of skin and other tissues that hold thetesticles. This helps keep them at the ideal temperature to make sperm. This article explains the structure of the scrotum, its function, and possible problems that involve the scrotum. ericsphotography / Getty Images Anatomy of the Scrotum The scrotum is part of the male anatomy. It is a sac of skin and muscle that hangs in front of the pelvis, between the legs....
