Introduction The medial pectoral nerve arises from the medial cord of the brachial plexus (C8-T1). It primarily innervates the pectoralis major (sternocostal head) and pectoralis minor muscles. Unlike the lateral pectoral nerve, it pierces the pectoralis minor before reaching the pectoralis major. This nerve plays a role in shoulder adduction, internal rotation, and scapular stabilization….
The patellofemoral joint is a unique and complex structure composed of static (bones and ligaments) and dynamic (the neuromuscular system) elements. The patella is shaped like a triangle, having an inferiorly oriented tip. The primary articulating surfaces of the patellofemoral joint are the trochlea and the distal articulating surface of the femur, with which it articulates superiorly. Introduction The patellar surface of the femur and the posterior surface of the patella articulate to produce…
Introduction The Anterior Interosseous Nerve (AIN) is a branch of the median nerve that arises in the forearm. It supplies the flexor pollicis longus (FPL), the lateral half of the flexor digitorum profundus (FDP) (to the index and middle fingers), and the pronator quadratus (PQ). It is purely a motor nerve, with no sensory function….
Introduction The long thoracic nerve arises from the C5-C7 nerve roots and innervates the serratus anterior muscle. It plays a crucial role in scapular stability, preventing winging of the shoulder blade. Injury to this nerve can result in scapular winging, weakness in shoulder protraction, and difficulty in overhead movements. The serratus anterior muscle, one of…
Hip Flexion and Extension: What Is It? Hip flexion and extension are basic hip joint motions that are necessary for a variety of tasks, including sitting, jogging, jumping, and walking. It is necessary to understand hip flexion and extension for the purpose of evaluating and improving functional mobility, athletic performance, and rehabilitation. Hip flexion is…
The coccygeal nerve is the 31st and final spinal nerve, arising from the coccygeal region of the spinal cord. It primarily contributes to the coccygeal plexus, which provides sensory innervation to the skin over the coccyx and motor fibers to parts of the pelvic floor muscles. It plays a minor role in overall nerve function…
What is an Ulnar and Radial Deviation of the Wrist? Radial and ulnar deviations are functionally significant wrist movement, they are essential for maintaining the wrist joint‘s overall stability and balance. By equitably distributing pressures across the wrist joint during weight-bearing exercises, these movements help reduce the likelihood of injury or excessive strain on specific…
Anatomy of Gastrocnemius Muscle The gastrocnemius is a large, two-headed muscle in the calf that forms the bulk of its shape. It originates from the femur and inserts into the Achilles tendon, working with the soleus muscle to enable plantar flexion of the foot and assist in knee flexion. It plays a crucial role in…
The pubic symphysis is a cartilaginous joint located between the left and right pubic bones of the pelvis. It provides stability while allowing slight movement to accommodate activities such as walking and childbirth. The joint is reinforced by strong ligaments and contains a fibrocartilaginous disc that helps absorb shock. Introduction The hip bones’ left and…
Introduction The inferior gluteal nerve is also a motor branch of the sacral plexus, coming from the posterior divisions of the L5, S1, and S2 anterior roots. It flows inferiorly and exits the pelvic cavity via the larger sciatic foramen while going inferiorly to the piriformis muscle. The gluteus maximus muscle receives motor innervation from…
