Skeletal Muscles

The main hip & groin muscles consist of the iliopsoas, pectineus, rectus femoris, and sartorius at the front. The gluteus medius, gluteus minimus, piriformis, tensor fasciae latae on the outside. Gluteus maximus, biceps femoris, semitendinosus, semimembranosus at the back and the adductor or groin muscles (adductor brevis, adductor longus, adductor Magnus, and gracilis). Gracilis Gracilis

The knee joint consists of the femur (thigh bone), tibia, and fibula bones of the lower leg and the patella or kneecap. The muscles which flex and extend (bend and straighten) the joint are the quadriceps muscles (rectus femoris, vastus lateralis, vastus medialis) and the hamstring muscles at the back of the thigh (semitendinosus, semimembranosus,

The main muscles which move the wrist and hand consist of the flexor carpi radialis, palmaris longus, flexor carpi ulnaris, extensor carpi ulnaris, extensor carpi radialis brevis, extensor carpi radialis longus, flexor digitorum superficialis, flexor digitorum profundus, flexor pollicis longus, extensor digitorum, extensor indicis, extensor digiti minimi, extensor pollicis longus, extensor pollicis brevis and adductor

The elbow joint consists of the humerus (upper arm bone), radius, and ulna in the forearm. The ulna is the bone on the little finger side of the forearm (remember l in ulna for little finger) and the radius radiates around it. The elbow joint muscles are the biceps brachii, brachialis, brachioradialis, triceps brachii (triceps

The shoulder joint, also known as the glenohumeral joint is a ball and socket joint and consists of the humerus (upper arm bone), clavicle (collar bone), and scapula (shoulder blade). The muscles which stabilize and enable movement of the joint are the pectoralis major, teres major, supraspinatus, deltoid, and latissimus dorsi. Teres major Teres major

A motor unit comprises a motor neurone and all the muscle fibres it supplies. Nerve propagation is the way in which a nerve transmits an electrical impulse. Nerve Structure In order to understand nerve propagation, it is important to understand the structure of a motor neurone (nerve). Each neuron contains a cell body and an

The different skeletal muscle shapes in the human body are circular, convergent, parallel, pennate, and fusiform. Circular Muscles These muscles appear circular in shape and are normally sphincter muscles that surround an opening such as the mouth, surrounded by Obicularis Oris and Obicularis Oculi surrounding the eyes Convergent Muscles These are muscles where the origin

The three types of muscle found in the human body are skeletal, smooth, and cardiac muscle. Skeletal muscle Skeletal muscles attach to bones. Their main function when they contract is the movement of the skeleton. Sometimes we call skeletal muscle types striated muscle. This is because of their striped appearance caused by bands of Actin

Within skeletal muscles, there are three muscle fibre types. Type one (I), type two A (IIa) and type two B (IIb). Each fibre type has different qualities in the way they perform and how quickly they fatigue. Type I muscle fibres Type I muscle fibres are slow-twitch. They are red in colour due to large

The sliding filament theory of muscle contraction is the mechanism by which muscles are thought to contract at a cellular level. It explains the steps in muscle contraction. A good understanding of skeletal muscle structure is useful when learning how sliding filament theory works. What is sliding filament theory? At a very basic level, each