Extensor Compartment Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
What is the blood supply of the extensor forearm? | Radial AND interosseus arteries |
Nerve supply to extensor compartment | radial nerve + branches |
What are the (6) superficial muscles of the extensor compartment? | Brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris |
What are the (5) deep muscles of the extensor compartment | Supinator, abductor pollicis longus, extensor policis brevis, extensor pollicis longus, extensor indicis |
Brachioradialis: nerve, action | Radial nerve, flexes forearm and initiates supination and pronation |
Extensor carpi radialis longus: nerve, action | Extends and abducts hand at the wrist joint |
Extensor carpi radilis brevis: nerve, action | deep branch of radial nerve, extends and abducts hand at the wrist joint |
Extensor digitorum: nerve, action | posterior interosseus branch of radial nerve, extends fingers, knuckles, and hands at the wrist joint |
Extensor digiti minimi: nerve, action | Posterior interosseus branch of radial nerve, extends little finger |
Extensor carpi ulnaris: nerve, action | posterior interosseus branch of radial nerve, extends and adducts hand at the wrist joint |
Supinator: nerve, action | Deep branch of radial nerve, supinates forearm |
What structures are compromised in tennis elbow? | Inflammation of common extensor tendon of the lateral epicondyle of the humerus |
What are the symptoms of tennis elbow? | Pain in lateral aspect of elbow (may radiate down to posterior forearm and dorsum of hand) |
What movements cause tennis elbow? | Excessive/heavy supination/pronation of forearm (e.g. shoveling snow) |
Abductor pollicis longus: nerve, action | posterior interosseus branch of radial nerve |
Extensor pollicis brevis: nerve, action | Posterior interosseus branch of radial nerve, extends thumb, knuckle, and wrist |
Extensor pollicis longus: nerve, action | posterior interosseous branch of radial nerve, extends thumb, knuckle, and wrist |
Extensor indicis: nerve, action | posterior interosseus branch of radial nerve, extends index finger, knuckle, and wrist |
The radial nerve descends between the ____ and the ____ muscles | brachialis; brachioradialis |
The radial nerve crosses the ____ epicondyle ____ly. It emerges in the posterior compartment as the ___ __ nerve. | Lateral; anteriorly; Posterior interosseus nerve |
What is the palmar aponeurosis? | Triangular shaped thickening of deep fascia covering central palm |
The apex of the palmar aponeurosis receives insertion from the ___ ___ tendon. | Palmaris longus |
The palmar aponeurosis divides at the base of the fingers into four slips which each subdivide into two additional slips and attach to the ___ ___ __ and the __ ___ ___ ___. | Fibrous flexor sheath; deep transverse metacarpal ligament |
What is the localized thickening and contracture of the palmar aponeurosis called? | Dupuytren's contracture |
What symptoms are seen in Dupuytren's contracture? | Thickening and contracture of plamar aponeurosis-->flexing of ring finger into palm at the metacarpophalangeal joint; flexion of proximal interphalangeal joints; DISTAL INTERPHALANGEALS NOT INVOLVED |
What is the carpal tunnel? | Space under flexor retinaculum where long flexor tendons and median nerve pass through |
How are the tendons of the carpal tunnel arranged? | Four tendons of flexor digitorum superficialis arranged in anterior and posterior rows (middle + ring in front of index and little finger tendons); flexor digitorum profundus tendons all in line (in order of fingers) |
All eight flexor tendons invaginate a common synvial sheath from ___ side. | Lateral |
Where does the common synvial sheath end distally? | At the knuckle joints, except for the little finger (that one goes to the distal phalanx) |
Which tendon gets its own synovial sheath? | The tendon of the flexor pollicis longus |
What is the fibrous flexor sheath? | Surrounds the synovial sheaths that attache to the sides of the phalanges from the head of the metacarpal bones to the base of the distal phalanges (closed at ends) |
Name the thenar muscles of the hand (3) | Abductor pollicis brevis, flexor pollicis brevis, opponens pollicis |
Name the adductor compartment muscles (1) | Adductor pollicis |
Abductor pollicis brevis: nerve, action | recurrent branch of median nerve, abducts thumb |
Flexor pollicis brevis: nerve, action | recurrent branch of median nerve |
Opponens pollicis: nerve, action | recurrent branch of median nerve, opposes thumb |
Adductor pollicis: nerve, action | deep branch of ULNAR NERVE, adducts thumb |
Name the hypothenar muscles (3) | Abductor digiti minimi, flexor digiti minimi, opponens digiti minimi |
Abductor digiti minimi: nerve, action | deep branch of ulnar nerve, abducts the little finger |
Flexor digiti minimi: nerve, action | deep branch of ulnar nerve, flexes little finger |
Opponens digiti minimi: nerve, action | Deep branch of the ulnar nerve, opposes the little finger and deepens the palm |
The lumbrical muscles: nerve, action | first and second: median nerve; third and fourth: ulnar nerve. Flexes metacarpophalangeal joints (knuckle) and extends interphalangeal joint |
Name the interosseous muscles (2) | Palmar interosseus muscles, dorsal interosseus muscles |
Palmar interosseus muscles: nerve, action | deep branch of ulnar nerve, flex metacarpophalangeal joints, extend interphalangeal joints, adduct fingers towad center of middle finger |
Dorsal interosseus muscles: nerve, action | Deep branch of ulnar nerve, flex metacarpophalangeal joints, extends interphalangeal joints, abduct fingers from center of third finger |
What is the position of the ulnar artery as it's passing the flexor retinaculum? The ulnar nerve? The pisiform? | It is superficial to flexor r.; lateral to nerve and pisiform bone |
What branch does the ulnar artery give off when entering the hand? | The deep ulnar branch, which passes between abductor digiti minimi and flexor digiti minimi |
The main trunk of the ulnar artery continues s the ___ ___ arch. It is completed on the lateral side by the ___ ___ ___ of the ___ ___ | Superficial palmar; superficial palmar branch of the radial artery |
What structures does the palmar arch supply? | All of the sides of the fingers EXCEPT for the thumb and the radial side of the index finger |
What two arteries join together to complete the deep palmar arch? | The deep branch of the ulnar artery and the radial artery |
What branch does the radial artery give off when entering the hand? | The superficial palmar branch |
What space does the radial artery enter before entering the hand? | The anatomical snuff box |
Where does the radial artery enter deep to when entering the hand? | Two heads of the first dorsal interosseus muscle |
The radial artery continues as the ___ ___ ___, which is completed on the medial side of the hand by the deep branch of the ulnar artery | Deep palmar arch |
What artery supplies the lateral side of the index finger? | The radialis indicis artery (branch of the radial artery) |
What artery supplies the thumb? | The princeps pollicis artery (branch of radial artery; splits into two for the two sides of thumb) |
The median nerve enters the palm by passing (deep/superficial) to the flexor retinaculum within carpal tunnel | Deep |
What motor and sensory information does the median nerve provide? | Motor: thenar muscles, 1st 2 lumbricals; Sensory: lateral palm, palmar aspect of lateral 3 1/2 fingers |
What motor and sensory information does the ulnar nerve provide? | Motor: hypothenars, 3 + 4th lumbricals, adductor pollicus, palmaris brevis, all interossei muscles. Sensory: medial palm, palmar aspect of the medial 1 + 1/2 fingers |
The ulnar nerve enters palm by passing (deep/superficial) to the flexor retinaculum and immediately (lateral/medial) to the pisiform bone. | Superficial, lateral |
Created by:
karkis77
Popular Anatomy sets