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Muscles of the Hand (Division, Origin, Insertion, Functions)

Content 0:00 Introduction 0:21 Division of the Hand Muscles 0:51 Thenar Muscles 2:50 Hypothenar Muscles 4:33 Middle Hand Muscles ------------------------------- 🫀 Join:    / @taimtalksmed   📷 Follow my IG:   / taimtalksmed   💝 Donation link: https://www.buymeacoffee.com/taimtalk... ------------------------------- Muscles of the hand Muscles of Thenar Eminence Muscles of Hypothenar Eminence Middle Hand Muscles ○ Interossei muscles ○ Lumbrical muscles Thenar Muscles Abductor Pollicis Brevis Opponens Pollicis Flexor Pollicis Brevis Adductor Pollicis Opponens Pollicis musculus opponens pollicis O: Flexor retinaculum and trapezium I: Base of 1st metacarpal bone basis ossis metacarpalis I F: Opposition and flexion of thumb Flexor Pollicis Brevis musculus flexor pollicis brevis O: Flexor retinaculum Deeper part: Trapezium, trapezoideum I: Base of Proximal Phalanx of the thumb basis phalangis proximalis pollicis F: Opposition + Flexion of the thumb Adductor Pollicis musculus adductor pollicis O: Oblique head: Capitate + base of 2/3rd metacarpal Transverse head: 3rd metacarpal I: Base of Proximal Phalanx of the thumb basis phalangis proximalis pollicis F: Adduction of the thumb Abductor Pollicis Brevis musculus abductor pollicis brevis O: Flexor retinaculum I: Base of proximal phalanx of thumb basis phalangis proximalis pollicis F: Abduction of thumb Hypothenar Muscles Opponens digiti minimi musculus opponens digiti minimi O: Flexor retinaculum + Hamatum I: 5th metacarpal bone Os metacarpale V F: Opposition of little finger Flexor Digiti Minimi Brevis musculus flexor digiti minimi brevis O: Flexor retinaculum + Hamatum I: Base of Proximal Phalanx of Little Finger basis phalangis proximalis digiti minimi F: Flexion of little finger Abductor Digiti Minimi musculus abductor digiti minimi O: Flexor retinaculum + Pisiform I: Base of Proximal Phalanx of Little Finger basis phalangis proximalis digiti minimi F: Abduction of little finger Palmaris Brevis musculus palmaris brevis O: Flexor retinaculum + Palmar Aponeurosis I: Skin of the palm on the ulnar side F: Pulls the skin and produces wrinkles on the hypothernal side Middle Hand Muscles Palmar Interossei Musculi interossei palmares Three muscles located in the 2nd-4th interosseous space between the metacarpals O: 2nd metacarpal – Medial side 4th metacarpal – Lateral side 5th metacarpal – Lateral side I: Proximal Phalanx of 2nd, 4th and 5th finger F: Adduction of fingers: Pulls 2nd, 4th and 5th fingers to 3rd finger Dorsal Interossei Musculi interossei dorsales Four muscles located in the 1st-4th interosseous space between the metacarpals O: Between the metacarpal bones of 1st to 5th fingers I: Proximal Phalanx of 2nd-4th fingers F: Abduction of fingers: Pulls 2nd, 4th fingers away from 3rd finger Lumbricals Musculi lumbricales Four muscles corresponding to the 2nd-5th digits O: Tendons of the flexor digitorum profundus I: Proximal Phalanx of 2nd-5th fingers F: Flexion of proximal phalanges Extension of middle and distal phalanges