Hand Muscles brought to you by @rev.med ✋🏽 Also notes here ⤵️ 🧠 Tell us below in the comments - which class are you currently struggling with? ✅ Overview Today: Intrinsic muscles, which means they are located within the hand, and responsible for fine motor functions of the hand. See if you want to really memorize and know them.. then follow this method: 1️⃣ Thenar (thumb) muscles 2️⃣ Hypothenar (pinky) muscles 3️⃣ Other muscles: Interossei, palmaris brevis & Lumbricals @rev.med ✅ Intrinsic Muscles ✋🏾 1️⃣ Thenar (Thumb) Muscles All Innervated by Median nerve - Except Adductor Pollicis Muscle *Adductor pollicis muscle (Ulnar nerve) Insertion - Both attach into base of proximal phalanx of the thumb Action - Adductor of the thumb *Flexor pollicis brevis muscle Insertion - Base of the proximal phalanx of thumb Action - Flexes MCP joint of the thumb *Abductor pollicis brevis muscle Insertion - Lateral side of proximal phalanx of thumb Action - Abducts the thumb *Opponens pollicis muscle Insertion - Lateral margin of the first metacarpal of thumb Action - Opposes thumb, medially rotates and flexes metacarpal on the trapezium @rev.med 2️⃣ Hypothenar (Pinky) muscles All innervated by Ulnar nerve *Abductor digiti minimi brevis muscle Insertion - Base of proximal phalanx of little finger Action - Abducts little finger *Flexor digiti minimi brevis muscle Insertion - base of proximal phalanx of little finger Action - Flexes MCP joint of little finger *Opponens digiti minimi muscle Insertion - Medial margin of 5th metacarpal Action - Rotates metacarpal of little finger towards palm, producing opposition. 3️⃣ Other muscles *Lumbricals (4) - Index & middle fingers innervated by median nerve. Little and ring finger innervated by ulnar nerve. *Interossei (2) - Dorsal and palmar interossei innervated by ulnar nerve *Palmaris Brevis muscle - innervated by ulnar nerve @rev.med @rev.med #handmuscle #REVMED #REVupyourbrain #REVmedicine https://www.instagram.com/p/CTclvrwM5Tu/?utm_medium=tumblr
