Introduction The Back muscles are a group of strong, paired muscles located on the trunk’s posterior aspect. They provide spinal movement, trunk stability, and coordination of limb and trunk movements.Back muscles are divided into two major groups: Extrinsic (superficial) back muscles are those that are closest to the skin on the back. These muscles are…
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…
What Is The Stapedius Muscle? The human body’s smallest skeletal muscle is the stapedius. Its function is to maintain the stapes, or combing bone, of the middle ear, the smallest bone in the body, measuring slightly over a millimeter in length. Structure The stapedius inserts into the stapes neck after coming from a small foramen…
What Is The Palmaris Longus Muscle? The Palmaris Longus muscle is a slender, superficial muscle located in the forearm. It is one of the muscles belonging to the superficial flexor group and plays a minimal role in wrist flexion. This muscle is a member of the superficial forearm flexor group. Its most common proximal attachment…
What Is The Diaphragm Muscle? The diaphragm, an essential respiratory muscle, divides the thoracic and abdominal areas. It is positioned below the lungs and is critical for breathing because it contracts and relaxes to change the volume of the thoracic cavity. The diaphragm contracts during inhalation, removing and expanding the thoracic cavity to facilitate the…
