Introduction The shoulder joint, also known as the glenohumeral joint, is a ball and socket joint with the widest range of motion in the human anatomy. The shoulder muscles perform a variety of functions, including abduction, adduction, flexion, extension, internal and external rotation. The scapula is the shoulder’s central bony structure and the site of…
What Is The Flexor pollicis longus Muscle? In the anterior compartment of the forearm, the flexor pollicis longus (FPL) is a long muscle situated at the deep layer with the flexor digitorum profundus and pronator quadratus. Despite being located in the forearm, it is considered a component of the hand’s extrinsic muscles because it is…
Introduction The calf muscles, located on the back of the lower leg, are a crucial part of the human body’s musculoskeletal system. These muscles, primarily consisting of the gastrocnemius and the soleus, play a vital role in various movements, including walking, running, and jumping. The gastrocnemius is the most superficial muscle, with two heads: medial…
Introduction The hamstring is a group of 3 muscles located at the back of the thigh. These muscles include the biceps femoris, semitendinosus, and semimembranosus. Together, they play a crucial role in various movements of the hip and knee, such as walking, running, and jumping. The hamstrings are a group of three muscles that primarily…
Introduction Four muscles in the front of the thigh are called the quadriceps, or quads. They are some of the body’s biggest and most powerful muscles. The quadriceps muscles allow you to stand, walk, run, squat, and jump. They are some of the strongest muscles in the body and together they comprise most of the…
The lumbrical muscles of the hand are a group of four small, intrinsic muscles located within the palm. Despite their diminutive size, they play a crucial role in hand function, particularly in fine motor movements and dexterity. The lumbrical muscles are located at the base of the palm. The proximal and middle phalanges of the…
Introduction The hypoglossal nerve is the 12th paired cranial nerve. Its name is derived from ancient Greek, where ‘hypo’ means under and ‘glossal’ means tongue. Except for the palatoglossus, which is innervated by the vagus nerve, the nerve has a solely somatic motor function, innervating the intrinsic and extrinsic muscles of the tongue. The hypoglossal…
Abducens nerve palsy is a disorder where injury to a specific nerve disrupts eye movement and alignment. The abducens nerve, one of the pairs of cranial nerves, regulates the movement of your eyes away from your nose. Abducens nerve palsy is a nerve problem that involves eye muscle control. It makes turning an affected eye…
Introduction The vagus nerve, also known as the 10th cranial nerve or CN X, is one of the longest and most complex nerves in the human body. It starts in the brainstem, travels through the neck, chest, and abdomen, and branches out to the heart, lungs, digestive tract, and even the tongue and ears. The…
Introduction The accessory nerve, also known as cranial nerve XI (CN XI), is one of the 12 cranial nerves in humans. It is considered a motor nerve and primarily innervates the sternocleidomastoid and trapezius muscles, which play crucial roles in head and shoulder movements. It has a cranial and a spinal component, though there is…
