Test 5 Flashcards by Jennifer Kean

Muscuocutaneous ( peripheral nerve)

innervates, biceps, brachialis,corocobrachiallis

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Median ( peripheral nerve)

formed by a spinal nerve root C6, C7, C8, T1
MOTOR
1. pronator teres
2.palmaris longus
3.flexor carpi radialis
4.flexor digitorum superficialis
5.flexor digitorum profundus ( index and middle)
6.pronator quadratus
7. flexor pollicis longus (IP thumb)
8.abductor pollicis brevis
9.opponens pollicis
10. flexor pollicis brevis
11. lumbricals 1 and 2
12. Sensory - volar thumb, index,mid and half of ring.

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Ulnar (peripheral nerve)

Formed from roots C8 and T1
MOTOR
1. Flexor carpi ulnaris
2. flexor digitorum profundus ( ring and middle)
3.palmaris brevis
4.abductor digiti minimi
5.adductor pollicis ( web space)
6. interossi
7. opponens digiti minimi
8. flexor digiti minimi
9. lumbricals 3 and 4 ( flexes DIPS)
10. Sensory- volar and dorsal half of rig and little finger and palm to wrist.

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Radial ( peripheral nerve)

Formed from spinal roots C5, C6, C7, C8, T1
MOTOR
1. Triceps
2.brachialialis
3. anconeus
4. supinator
5. brachioradialis
6. ECRL
7. ECRB
8. ECU
9. EDC
10. EDM
11. abductor pollicis longus
12. extensor pollicis brevis
13. extensor pollicis longus
14. extensor indicis
15. Sensory- dorsum of hand, radial side and up dorsal forearm. Dorsal sensory radial nerve (Great extensor), posterior interosseous nerve.

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what does the term carrying angle refer to?

In anatomical position the longitudinal axis of humerus and the forearm form the carrying angle midline between radius and ulna. The angle disappears during pronation. Women angle is 10-15% and men 5%.

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cubital fossa

median nerve, elbow ( where blood is drawn). Bordered laterally by the brachioradialis, medially pronator teres and superiorly by the medial and lateral epicondyles.

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cubital tunnel

tunnel between medial epicondyle and elbow, ulnar nerve. “ funny bone” The small and ring finger and hypothenar eminence.

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carpal tunnel

created by flexor retinaculum closing over median nerve and 9 flexor tendons of the wrist. the compression of the median nerve within the carpel tunnel.Thumb, index and middle finger

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A.Pronation and supination occur at which joints?
B.What is the plane of motion and axis?
C. In which position are the bones parallel?
D. Which bone moves over the other one?

A.PRUJ and DRUJ
B. transverse plane with longitudinal axis
C. Supination radius and Ulna parallel
D. During pronation the radius crosses over ulna

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A.Pronation and supination occur at which joints?
B.What is the plane of motion and axis?
C. In which position are the bones parallel?
D. Which bone moves over the other one?

A.PRUJ and DRUJ
B. transverse plane with longitudinal axis
C. Supination radius and Ulna parallel
D. During pronation the radius crosses over ulna

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What stops elbow extension?

olecranon process of the ulna fitting into the olecranon fossa of the humerus. Hard end feel

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A.Describe the ligamentous support at the elbow,

.name the ligaments.

.medial/ulnar collateral, lateral/radial collateral provide medial and lateral stability.
annular ligament holds radius head against ulna and attaches anteriorly and posteriorly.

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A.where is there the most support at elbow

and where is least support at elbow due to the ligaments and the capsule?

The most support is the collateral ligaments the least support is the capsule anteriorly and posteriorly. The capsule is at every joint. The capsule is a band that holds synovial fluids in. When damaged causes edema.

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In what position are the ligaments and bony structures close packed at the elbow?

extension

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Name the 3 flexors and 1 extensor muscle at the elbow and 2 facts about each.

Flexors: Biceps brachii innervated by musculocutaneous nerve and spurt muscle, Brachialis is a spurt muscle and is strongest at 100 degrees of elbow flexion , brachioradialis most active in neutral forearm rotation with elbow flexion. ( drinking) and has long muscle fibers.
extensors: Triceps has 3 heads, the long head is actively insufficient when full elbow extension is attempted with shoulder in hyperextension.

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what are the ligamentous structures that hold the PRUJ and the DRUJ in place?

the proximal 3 ligaments: annular, quadrate,: and oblique. The 2 distal ligaments are palmer and dorsal radioular ligaments.

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What is the primemover and type of contraction of the functional motions using a
a .hammer
b. lifting a tray
c. turning a card over

a. triceps concentric
b. brachioradilais concentric
c. supinator concentric

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Biceps muscle innervates what nerve?

Musculocutaneous

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Triceps muscle innervates what nerve?

radial

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Pronator Teres muscle innervates what nerve?

Median

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Pronator quadratus muscle innervates what nerve?

Median

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supinator muscle innervates what nerve?

radial

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brachioradialis muscle innervates what nerve?

radial

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review the joints of the wrist and hand

Study These Flashcards

joints wrist: radiocarpal, ulnocarpal and midcarpal

hand: DIP, PIP, MCP, CMC,

what is the angle of inclination at the distal radius?

volarly more wrist flexion, ulnarly more deviation and the oblique angles ulnarly.

name the 5 muscles that originate on the medial epicondyle.

FCU, FCR, pronator teres, FDS, palamris longus, | Im am not sure of this question!!! please double check

Name the 4 muscles that originate on the lateral epicondyle

ECRB, ECU, EDC, EDM

Name the 3 arches of the hand

1. Fixed transverse: distal carpal row. The hamate, capitate,trapezium. 2. mobile transverse: metacarpal heads 3. longitudinal: connects 2 transverse arches. (cup around ball)

What is the fixed and mobile unit of the hand?

Fixed: distal carpal row and 2,3 MCPs Mobile: 4,5 MCP and phalanges

How much load is attributed to the radiocarpal joint at the wrist with motion?

80% of the radial carpal joint

Name the structures that articulate at the ulnocarpal joint

The ulna, TFC( like a trampoline on top ulna. no bone on bone) and carpal bones and triquetrium

what is an intercalated segment and how does it relate to normal and abnormal function at the wrist.

when two strong units press against the proximal row which is highly mobile and the fixed unit of the hand. The proximal row feels first which risks torn ligaments. The distal row is strong.

A.At which joints does wrist motion occur? B.Where does the motion start? C.Where is the wrist closed packed?

A. 1st midcarpal B. radial carpal, ulnocarpal C. wrist extension

How much stability do you have at your finger CMC joints?

minimal index and middle finger, 15 degrees at ring CMC,30 degrees at little finger CMC

Describe the bony articulation surface of the thumb CMC, ligamentous

saddle joint so there is more movement | collateral ligaments and the volar plate(are at every joint in hand) limits hyper extension.

Describe the ligamentous support at your MP and IP joints

volar plate a strong palmer ligament for IP and MP and collateral ligament for IP.

Describe the ligamentous support at your wrist

collateral ligaments, Dorsal radiocarpal, is tight flexion, volar radiocarpal is tight extended wrist, intercarpal ligaments

What ligamentous structure limits MP abduction

Transverse metacarpal ligament

In what position is the MP joint close packed?

Flexion

What structures lie under the flexor retinaculum- transverse carpal ligament?

median nerve and the 9 flexor tendons, FDS, FDP, FPL

Name the 6 dorsal compartments..for this test just need to know 1,2 and 6

extensor side: First: APL, EPB, Second: ECRB, ECRL SIxth: ECU

What is the function of the pulleys and which are the most crucial ones to have for function?

They help keep the flexor tendons on running along bone- transmit power to prevent bow stringing. 2 and 4 are significant

radial neuropathy causes wrist drop. Can you describe why this happens?

without the proper electrical activity, the muscles that extend the wrist will not work. Will be able to do PIP and DIP.

If you injure your ulnar nerve at the mid forearm, you will be unable to do which finger motions?

interrossei which does abduction and adduction and and no lumbricals action which do flexion in the little finger MP

Name the three types of grip and understand the differences in muscle use related to them.

cylinder: FDP, FDS, FPL, thenar " hold drink" spherical: FDP, FDS, FPL, interrosei via finger abduction " hold ball" Hook: FDS, FDP, no thumb! " brief case hold"

Name the three layers of flexor muscles on the forearm

The flexors: superficial, intermediate and deep palmaris longus,pronator teres,FCR are superficialis, FDS( intermediate), FDP, FPL,PQ are deep. The extensors have 2 layers deep and superficial. The superficial layer has brachioradialis, ECRL, ECRB, EDC,EDM,ECU and Deep has supinator, extensors indicis, APL, EPL, and EPB.

what muscles are responsible for extending the IPs of the fingers?

Lumbricals radial side and interrosei ulnar side

what is the web space muscle?

adductor pollicis

which muscle plays a more active role in wrist extension with heavy resistance?

ECRB heavy gripping and grasp functions

which muscle is the workhorse of finger flexion?

FDP extrinsic muscle

which of the intrinsic muscles is stronger dorsal or volar interrossei?

dorsal

Name the extrinsic thumb muscles and their function

EPL, FPL, EPB, APL,help radial abduction in thumb

Name the Thenar muscles

opponens pollicis, abductor pollicis brevis, flexor pollicis Brevis, adductor pollcis

hypothenar muscles

abductor digiti minimi, flexor digiti minimi, opponens digiti minmi

spurt muscle

distal insertion close to joint they move

what is the primemover of MP extension?

EDC

what is the prime mover of DIP and PIP extension?

lumbricals radial side | interossei ulnar side

what is the nerve that innervates the EDC?

radius

what nerve innervates the interrossei?

ULNAR

Test 5 Flashcards

(59 cards)