Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




share
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

Extensor Compartment

The Extensor forearm and hand

QuestionAnswer
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