Posterior Forearm and Dorsum of Hand Flashcards
Extensor Retinaculum
What is the thickening of the antebrachial fascia in the distal forearm that binds down the extensor tendons as they pass onto the dorsum of the hand
Superficial Branch of the Radial Nerve
What nerve passes from below the brachioradialis muscle and over the extensor retinaculum to supply cutaneous innervation to the dorsum of the hand?
Radial Artery
What Artery passes through the anatomical snuff box?
Extensor Pollicis Longus Muscle
Extensor Pollicis Brevis
Abuctor Pollicis Longus
What muscles make up the anatomical snuff box?
What muscle takes origin from the posterior middle third of the ulna and adjacent interosseous membrane, and attaches distally to the base of the distal phalanx of the thumb?
What muscle takes origin from the posterior distal third of the ulna and adjacent interosseous membrane, and attaches distally to the base of the proximal phalanx of the thumb?
What muscle takes origin from the proximal halves of the radius, ulna and interosseous membrane, and attaches distally to the base of the first metacarpal?
Extensor Carpi Radialis Longus (ECRL)
Extensor Capri Radialis Brevis (ECRB)
Extensor Digitorum (DM)
Extensor Digiti Minimi (EDM)
Extensor Carpi Ulnaris (ECU)
What muscle takes origin from the lateral supracondylar ridge distal to the origin of the brachioradialis and inserts distally into the 2nd metacarpal?
What muscle takes origin from the lateral epicondyle (common extensor origin) and inserts distally into the 3rd metacarpal.
What muscle takes origin from the common extensor area (lateral epicondyle) and inserts into the extensor hood or expansion of the medial four fingers? It primarily extends the fingers at the MP joint.
What muscle takes origin from the common extensor origin and inserts into the extensor expansion of the 5th finger?
What muscle takes origin from the lateral epicondyle and posterior border of the ulna, and inserts into the dorsal side of the base of the 5th metacarpal? It extends and adducts the hand.
Extensor Indicis Muscle
Supinator Muscle
Abductor Pollicis Longus
Extensor Pollicis Longus
Extensor Pollicis Brevis
What muscle takes origin from the distal third of the ulna and adjacent interosseous membrane, and inserts into the extensor expansion of the 2nd finger.
What muscle takes origin from the lateral epicondyle, posterior ulna, and adjacent ligaments associated with the radius, and inserts on the posterior lateral and anterior surfaces of the proximal radius. It supinates the forearm and hand.
Note the proximal attachments of the APL, EPB and the EPL.
Posterior Interosseus Nerve
Posterior Interosseus Artery
What nerve is a continuation of the deep branch of the radial nerve and supplies all of the extensor muscles in the forearm?
What artery runs with it?
Dorsal Interossei muscles
What muscles are all abductors of the digits (DABs) – they abduct the 2nd, 3rd and 4th digits from the midline. The interossei insert into the base of the proximal phalanx and the extensor hood
Extensor Hood or Expansion
What structure, which includes the insertion of the extensor tendons of the digits, the lumbricales, and the interossei muscles, continues distally over the dorsal surface of the phalanges. The tendon of the extensor digitorum splits over the proximal phalanx, with a middle component going to insert on the base of the middle phalanx, and two lateral component going laterally around the PIP joint and coming back together to insert into the base of the distal phalanx
Radial Collateral Ligament (of the elbow)
Anular Ligament of the Radius
Ulnar Collateral Ligament (of the elbow)
Radius
Ulna
Humerus
Biceps Brachii Tendon
Interosseous membrane
Radius
Ulna
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris
Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
Extensor indicis
Supinator
What is the thickening of the antebrachial fascia in the distal forearm that binds down the extensor tendons as they pass onto the dorsum of the hand
Extensor Retinaculum
What nerve passes from below the brachioradialis muscle and over the extensor retinaculum to supply cutaneous innervation to the dorsum of the hand?
Superficial Branch of the Radial Nerve
What Artery passes through the anatomical snuff box?
Radial Artery
What muscles make up the anatomical snuff box?
What muscle takes origin from the posterior middle third of the ulna and adjacent interosseous membrane, and attaches distally to the base of the distal phalanx of the thumb?
What muscle takes origin from the posterior distal third of the ulna and adjacent interosseous membrane, and attaches distally to the base of the proximal phalanx of the thumb?
What muscle takes origin from the proximal halves of the radius, ulna and interosseous membrane, and attaches distally to the base of the first metacarpal?
Extensor Pollicis Longus Muscle
Extensor Pollicis Brevis
Abuctor Pollicis Longus
What muscle takes origin from the lateral supracondylar ridge distal to the origin of the brachioradialis and inserts distally into the 2nd metacarpal?
What muscle takes origin from the lateral epicondyle (common extensor origin) and inserts distally into the 3rd metacarpal.
What muscle takes origin from the common extensor area (lateral epicondyle) and inserts into the extensor hood or expansion of the medial four fingers? It primarily extends the fingers at the MP joint.
What muscle takes origin from the common extensor origin and inserts into the extensor expansion of the 5th finger?
What muscle takes origin from the lateral epicondyle and posterior border of the ulna, and inserts into the dorsal side of the base of the 5th metacarpal? It extends and adducts the hand.
Extensor Carpi Radialis Longus (ECRL)
Extensor Capri Radialis Brevis (ECRB)
Extensor Digitorum (DM)
Extensor Digiti Minimi (EDM)
Extensor Carpi Ulnaris (ECU)
What muscle takes origin from the distal third of the ulna and adjacent interosseous membrane, and inserts into the extensor expansion of the 2nd finger.
What muscle takes origin from the lateral epicondyle, posterior ulna, and adjacent ligaments associated with the radius, and inserts on the posterior lateral and anterior surfaces of the proximal radius. It supinates the forearm and hand.
Note the proximal attachments of the APL, EPB and the EPL.
Extensor Indicis Muscle
Supinator Muscle
Abductor Pollicis Longus
Extensor Pollicis Longus
Extensor Pollicis Brevis
What nerve is a continuation of the deep branch of the radial nerve and supplies all of the extensor muscles in the forearm?
What artery runs with it?
Posterior Interosseus Nerve
Posterior Interosseus Artery
What muscles are all abductors of the digits (DABs) – they abduct the 2nd, 3rd and 4th digits from the midline. The interossei insert into the base of the proximal phalanx and the extensor hood
Dorsal Interossei muscles
What structure, which includes the insertion of the extensor tendons of the digits, the lumbricales, and the interossei muscles, continues distally over the dorsal surface of the phalanges. The tendon of the extensor digitorum splits over the proximal phalanx, with a middle component going to insert on the base of the middle phalanx, and two lateral component going laterally around the PIP joint and coming back together to insert into the base of the distal phalanx
Extensor Hood or Expansion
Radial Collateral Ligament (of the elbow)
Anular Ligament of the Radius
Ulnar Collateral Ligament (of the elbow)
Radius
Ulna
Humerus
Biceps Brachii Tendon
Interosseous membrane
Radius
Ulna
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris
Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
Extensor indicis
Supinator
