what is the origin and insertion of flexor digitorum superficialis?
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The radial head originates from the anterior portion of the radius. Flexor digitorum superficialis inserts onto the bodies of the middle phalanges of the medial four digits. This muscles action include flexion of the proximal interphalangeal joint, the metacarpophalangeal joint, and the wrist.
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The origin is the attachment site that doesn't move during contraction, while the insertion is the attachment site that does move when the muscle contracts. The insertion is usually distal, or further away, while the origin is proximal, or closer to the body, relative to the insertion.
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The common digital arteries are small vessels that come from the palmar arches and supply blood to the fingers. They are called “common” because most of these vessels travel in the palm toward the fingers and then split to provide blood to two different fingers.
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When your doctor performs this flicking motion, your finger tip is forced to quickly flex and relax. This causes the finger flexor muscles in your hand to stretch, which can then make your index finger and thumb flex involuntarily.
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Bunions are a deformity in the foot anatomy that causes the big toe to point toward the second one. This causes a bump on the edge of the foot at the joint of the big toe. Hammer toe is a deformity of the second, third or fourth toes that cause the toes to bend down like a claw.
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The gluteus medius muscle originates on the anterior gluteal surface of the ilium, between the iliac crest and posterior gluteal line above and the anterior gluteal line below (see photo below), the gluteal aponeurosis (thick fascia covering the gluteus medius) and inserts into the lateral surface of the greater ...
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The abductor brings the thumb away from the other four fingers. The flexor pollicis brevis, which lies next to the abductor, will flex the thumb, curling it up in the palm. The opponens pollicis lies deep to abductor pollicis brevis. As its name suggests, it opposes the thumb, bringing it against the fingers.
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Origin and insertion The brachioradialis muscle originates from the upper two-thirds of the lateral supracondylar ridge of humerus and the anterior surface of the lateral intermuscular septum of the arm. It slides over the lateral surface of the elbow joint, entering the anterolateral cubital area.
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Origin and insertion Biceps femoris is the most lateral hamstring muscle located in the posterior thigh. ... The long head of biceps femoris muscle originates from the medial facet (inferomedial impression) of ischial tuberosity, medial to the origin of semimembranosus and superior to the origin of adductor magnus muscle.
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The blood supply to the tibialis anterior muscle comes primarily from the anterior tibial artery and its branches. In general, muscles of this compartment help to flex the foot in an upward direction at the ankle and also extend the toes.
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The brachialis muscle originates from the anterior surface of the distal half of the humerus, just distal to the insertion of the deltoid muscle. It is also attached to the intermuscular septa of the arm on either side, with a more extensive attachment to the medial intermuscular septum.
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PALMARIS LONGUS This thin tendon attaches to the bottom side of the wrist and is missing in about 16 percent of people in a recent study. It's so weak that it has no substantial effect on grip, and if it's removed or cut, it doesn't cause any motility changes.
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Origin and insertion The coracobrachialis is a slender muscle that originates from the deep surface of the coracoid process of scapula. The muscle fibers run inferolaterally towards the humerus. They insert onto the anteromedial surface of the humeral shaft, between the brachialis muscle and the medial head of triceps.
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Palmaris longus is a muscle of the forearm and wrist. It originates at the medial epicondyle of the humerus and inserts, a bit, at the flexor retinaculum. However, its major insertion point is the palmar aponeurosis.
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Origin and insertion Anterior fibers: traditionally are thought to arise from the lateral two-thirds of the superior surface of the inguinal ligament, forming a common attachment with the iliac fascia. ... Lateral fibers: originate from the anterior two-thirds of iliac crest and then diverge superiorly and medially.
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Origin and insertion The extensor carpi ulnaris muscle originates from the lateral epicondyle of humerus, via the common extensor tendon, and adjacent fascia. ... Shortly after entering the hand, the tendon passes over the dorsal surface of triquetral bone and inserts to the medial aspect of the base of metacarpal bone 5.
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Orbicularis Oris Origin & Insertion Specifically, this muscle originates from the mid-line of the mandible and maxilla. ... From the mandible and maxilla, the orbicularis oris muscle then travels forwards and inserts right into the tissues of the upper and lower lips.