Review questions: Upper extremity Flashcards
Shoulder, Elbow, Forearm, Wrist, Hand
How many places does the upper extremity articulate with the axial skeleton:
A. 2 B. 3 C. 4 D. None of the above
D. none of the above
Which of the following statements is true about the glenohumeral joint capsule and ligaments:
A. Taut throughout the entire range of shoulder motion
B. Provide the primary source of stability in the mid-ranges of shoulder motion
C. Prevent excessive humeral head translation at end-ranges of shoulder motion
D. All of the above are true
C. Prevent excessive humeral head translation at end ranges of shoulder motion
To protect the anterior band of the inferior glenohumeral ligament complex after an anterior dislocation you would avoid the following positions:
A. Abduction and external rotation B. Adduction and external rotation C. Flexion and internal rotation D. Adduction and internal rotation
A. Abduction and external rotation
When the shoulder is in full forward elevation, the scapula should be in all of the following positions, EXCEPT:
A. Upward rotation B. Anterior tilt C. Posterior tilt D. Retraction
B. anterior tilt
All of the following could contribute to inferior shoulder subluxation after CVA, EXCEPT:
A. Serratus anterior paralysis B. Spasticity of the supraspinatus C. Deltoid paralysis D. Upper trapezius paralysis
B. Spasticity of the supraspinatus
Which of the following is most important in providing dynamic posterior glenohumeral joint stability:
A. Infraspinatus B. Subscapularis C. Supraspinatus D. Teres major
A. Infraspinatus
The most likely cause of loss of upward rotation of the scapula during shoulder elevation would be:
A. Weakness of lower traps B. Weakness of rhomboids C. Weakness of serratus anterior D. Weakness of upper traps
C. Weakness of serratus anterior
- A tear of the supraspinatus would likely result in:
A. Increased superior translation of the humeral head
B. Weakness in shoulder elevation
C. Altered scapulohumeral rhythm
D. All of the above
D. All of the above
- Your patient has significant loss of BOTH active and passive external rotation. The most likely cause of this would be:A. Weakness of the infraspinatus
B. Contracture of the axillary pouch
C. Weakness of the subscapularis
D. Contracture of the anterior capsule
D. Contracture of the anterior capsule
- Which of the following statements about the shoulder complex is FALSE:
A. Upward rotation of the scapula is accomplished by a force couple between
upper traps, lower traps and serratus anterior
B. Strengthening of periscapular muscles should be an essential part of treatment
of shoulder instability
C. Contracture of the axillary pouch would result in loss of adduction
D. Tear of anterior labrum could result in anterior shoulder instability
C. Contracture of the axillary pouch would result in loss of adduction
Use the following key for questions 11-14 to match the structure to loss of motion after contracture:
A. Rotator interval B. Anterior band of inferior glenohumeral ligament complex C. Posterior band of inferior glenohumeral ligament complex D. Posterior-superior glenohumeral capsule E. Axillary pouch F. Middle glenohumeral ligament
- Shoulder abduction ____
- Internal rotation with arm at the side ____
- External rotation with arm at the side ____
- External rotation in 90 degrees abduction ____
- E, 12. D, 13. A, 14. B
Which of the following is true regarding excessive cubitus varus:
A. Likely involves damage to the medial collateral ligament
B. Likely involves damage to the lateral collateral ligament
C. Would result in increased compression at the humeroradial joint
D. Would result in increased gapping at the medial elbow
B. Likely involves damage to the lateral collateral ligament
Loss of full extension of the elbow would be most likely due to:
A. Tightness in the posterior joint capsule
B. Tightness in the posterior band of the MCL
C. Tightness in the anterior band of the MCL
D. Tightness in the triceps muscle
C. Tightness in the anterior band of the MCL
Which of the following statements is true about the role of the interosseous membrane in the forearm:
A. Not particularly important for stability of the forearm
B. Transfers load from the ulna to the radius
C. Provides resistance to longitudinal distraction of the radius
D. None of the above are true
D. None of the above are true
Clicking during pronation and supination and increased translation between the distal radius and ulna is most likely due to:
A. Injury to the radial collateral ligament of the wrist
B. Injury to the ulnar collateral ligament of the wrist
C. Injury to the distal radial-ulnar ligaments of TFC
D. Injury to the ulnocarpal ligaments
C. Injury to the distal radial-ulnar ligaments of TFC
A muscle that attaches on the humerus and the ulna can theoretically do all of the following, EXCEPT:
A. Flex the elbow
B. Extend the elbow
C. Supinate the forearm
D. Could do all of the above
C. Supinate the forearm
To maximally shorten the biceps brachii muscle, you would:
A. Flex the shoulder; flex the elbow; supinate the forearm
B. Flex the shoulder; flex the elbow; pronate the forearm
C. Extend the shoulder; extend the elbow; pronate the forearm
D. Extend the elbow; flex the elbow; supinate the forearm
A. Flex the shoulder; flex the elbow; supinate the forearm
To maximally stretch the biceps muscle you would:
A. Flex the shoulder; flex the elbow; supinate the forearm
B. Flex the shoulder; flex the elbow; pronate the forearm
C. Extend the shoulder; extend the elbow; pronate the forearm
D. Extend the elbow; flex the elbow; supinate the forearm
C. Extend the shoulder; extend the elbow; pronate the forearm
To maximally stretch the triceps muscle you must fully supinate the forearm:
A. True B. False
B. False
Tightness/contracture of which of the following would result in loss of elbow flexion:
A. Brachialis
B. Anterior capsule
C. Posterior capsule
D. None of the above
C. Posterior capsule
The brachialis produces the greatest amount of flexion torque with the forearm in which of the following positions:
A. Pronation B. Supination C. Neutral D. Position of the forearm is not relevant
D. Position of the forearm is not relevant
The triceps would be active during high powered supination activities:
A. True B. False
A. true
The sequela of a tear of the MCL of the elbow could include:
A. Excessive cubitus varus
B. Increased gapping/separation of the medial side of the elbow
C. Increased compression on the medial side of the elbow
D. Increased gapping/separation on the lateral side of the elbow
B. Increased gapping/separation of the medial side of the elbow
Contracture (shortening) of the volar radiocarpal ligaments would most significantly limit which of the following wrist motions:
A. Wrist extension B. Wrist flexion C. Radial deviation D. Ulnar deviation
A. Wrist extension
An extreme amount of force delivered in which of the following directions would damage the ulnar collateral ligament of the wrist:
A. Wrist flexion B. Radial deviation C. Wrist extension D. Ulnar deviation
B. Radial deviation
Loss of wrist extensor muscle function results in:
A. Impairment of the wrist only
B. Minimal changes in hand function
C. Significant impairment in grip strength
D. No major loss of either wrist or hand function
C. Significant impairment in grip strength
The inability to perform pure flexion of the wrist without unwanted associated ulnar deviation occurring simultaneously indicates dysfunction of:
A. Flexor carpi ulnaris B. Flexor carpi radialis C. Extensor carpi radialis longus D. Extensor carpi ulnaris
B. Flexor carpi radialis
Contracture/shortening of the dorsal radiocarpal ligaments would result in loss of wrist extension:
A. True B. False
B. False
The inability to perform pure ulnar deviation without unwanted associated extension of the wrist indicates dysfunction of the:
A. Extensor carpi ulnaris B. Extensor carpi radialis longus C. Flexor carpi ulnaris D. Flexor carpi radialis
C. Flexor carpi ulnaris
The FDS, FDP, FCU and FCR are ALL considered potent wrist flexors:
A. True B. False
A. true
Positive ulnar variance:
A. Results in increased pressure on radiocarpal joint
B. Results in increased pressure on ulnocarpal joint
C. Results in even pressure on both radio- and ulnocarpal joints
D. Is the normal relationship between the distal radius and ulna
B. Results in increased pressure on ulnocarpal joint
In general, when the forearm is in the neutral position, ____% of the load is accepted by the radius and ____% of the load is accepted by the ulna:
A. 60; 40 B. 40; 60 C. 80; 20 D. 20; 80
C. 80; 20
Pure radial deviation of the wrist is accomplished by ____________ and the _____________
A. ECRL; FCU B. ECRL; FCR C. ECRB; FCU D. ECU; FCR
B. ECRL; FCR
Your patient’s PIP joints cannot be extended beyond 40 degrees of flexion REGARDLESS of the position of the MP or wrist joint. The most likely cause is:
A. Extrinsic finger flexor tightness B. Volar plate tightness C. Lumbrical/interossei tightness D. Extrinsic extensor tightness
B. Volar plate tightness
Your patient’s PIP joints cannot be extended beyond 40 degrees of flexion
REGARDLESS of the position of the MP or wrist joint. When making a splint for the above patient designed to stretch the involved tissue, you would:
A. Include the wrist in neutral B. Include the wrist in flexion C. Include the wrist in extension D. Not have to include the wrist at all
D. Not have to include the wrist at all
After damage to the flexor pulley system, the following could occur:
A. Increased tendon excursion/gliding
B. Decreased moment arms of finger flexors
C. Increased finger flexion range of motion
D. None of the above
D. None of the above
Ulnar deviation deformity of the MP joints of the fingers can involve which of the following tissue:
A. Sagittal bands
B. Radial collateral ligaments of the MCP joints
C. Extrinsic wrist ligaments
D. All of the above
D. All of the above
Your patient has full passive flexion of the digits but no active motion at all. The causes could include:
A. Tightness of extrinsic extensors B. Weakness of extrinsic extensors C. MP/IP joint stiffness D. Paralysis of extrinsic flexors
D. Paralysis of extrinsic flexors
Which of the following would favor successful development of a functional tenodesis grasp:
A. Overstretched finger flexors
B. Strong wrist flexion
C. Increased passive tension in finger flexors
D. None of the above
C. Increased passive tension in finger flexors
The inability to extend the MP joints of the fingers could be due to all of the following, EXCEPT:
A. Tightness in extrinsic flexors
B. Weakness of extrinsic flexors
C. Rupture of the sagittal bands
D. Paralysis of the extrinsic extensors
B. Weakness of extrinsic flexors
The lumbrical muscles would be at their SHORTEST length in which of the following positions:
A. MP flexion; IP flexion B. MP flexion; IP extension C. MP extension; IP flexion D. MP extension; IP extension
B. MP flexion; IP extension
All of the following positions could be assumed by independent action of either the intrinsics OR extrinsics, EXCEPT:
A. MP flexion; IP extension B. MP flexion; IP flexion C. MP extension; IP extension D. MP extension; IP flexion
C. MP extension; IP extension
Your patient’s PIP joints cannot be extended beyond 40 degrees of flexion with the wrist and MCP joints EXTENDED. HOWEVER, the PIP joints can be fully extended when the wrist and MCP joints are FLEXED. The likely cause of this is:
A. Extrinsic extensor tightness B. Volar plate tightness C. Extrinsic flexor tightness D. Lumbrical/interossei tightness
C. Extrinsic flexor tightness
Your patient has significantly limited MP flexion due to collateral ligament contracture after being immobilized incorrectly in a cast. The likely reason for the contracture is that the MP joints were in _____________ in the cast:
A. Flexion B. Extension C. Abduction D. Adduction
B. Extension
Activation of the extrinsic hand muscles causes MP ______ and IP ______:
A. flexion; flexion B. extension; extension C. flexion; extension D. extension; flexion
D. extension; flexion
Activation of the intrinsic hand muscles causes MP ______ and IP ______:
A. flexion; flexion B. extension; extension C. flexion; extension D. extension; flexion
C. flexion; extension
Your patient lacerated a tendon over the dorsum of the PIP joint. The PIP joint would rest in ________ because of the imbalance caused by the laceration of the __________.
A. Extension; central slip B. Flexion; terminal tendon C. Flexion; central slip D. Extension; terminal tendon
C. Flexion; central slip
Your patient has 60 degrees of total arm elevation but only 20-30 degrees of glenohumeral rotation. What’s the problem?
Rotator cuff tear
The patient has a rupture of the subscapularis on the right side. Why can’t he press into his belly and keep his right elbow out to the side?
Rupture means not abduction or lateral rotation of the subscapularis
your patient has full passive ER with the arm at the side bit and is unable to produce any active ER. What is the source of this limitation?
infraspinatus torn/ ruptured (infraspinatus and teres minor are primary external rotators
The final position of the scapula, when the shoulder is in full forward elevation, is?
upward rotation, elevation, external rotation, retraction, and posterior tilt
How many places does the upper extremity articulate with the axial skeleton?
1
articulates at the sternoclavicular joint
What group of muscles is perfectly suited to provide direct compression of the humeral head into the glenoid regardless of the position of the GH joint?
Rotator cuff muscles
superior glenohumeral ligament limits ____ translation with the shoulder in adduction and external rotation
anterior
The middle glenohumeral ligament limits anterior translation of the humeral head when the shoulder is ____ to 45 degrees and _____rotated
aBducted and externally rotated
What three parts make up the inferior glenohumeral ligament complex (IGHLC)?
Anterior band, axillary pouch and posterior band
What is the primary function of the anterior band of the IGHLC?
restrain anterior and inferior translation of the humeral head with the arm in 9o degrees of abduction and external rotation
Contracture of the axillary pouch limits aBduction.
A. true
B. false
True
A contracture of the rotator interval would result in loss of motion in which direction?
loss of external rotation with the arm at the side
What group of muscles is perfectly suited to provide direct compression of the humeral head into the glenoid regardless of the position of the GH joint?
rotator cuff muscles
True or false
Glenohumeral and Scapulothoracic motion occurs at a 2:1 ratio. Ex. If a person can rotate their arm 180 degrees 2/3rds is GH and 1/3rd is scapulothoracic motion.
True
The final position of the scapula, when the shoulder is in full forward elevation, is?
(list five positions)
upward rotation, elevation, external rotation, retraction, and posterior tilt
What are the periscapular muscles?
trapezius, levator scapula, rhomboids, serratus anterior and pectoralis minor
Which muscles elevate the scapula?
Upper traps., levator scapula, rhomboid minor and major
Which muscles depress the scapula?
lower traps, latissimus dorsi, and pectoralis minor
Upward rotation of the scapula is a force couple of which two muscles?
Serratus anterior and trapezius
Which of the following is most important in providing dynamic superior glenohumeral joint stability?
a. infraspinatus
b. subscapularis
c. supraspinatus
d. teres major
C. supraspinatus
Which of the following is most important in providing dynamic anterior glenohumeral joint stability?
a. infraspinatus
b. subscapularis
c. supraspinatus
d. teres major
b. subscapularis
Your patient has 60 degrees of total arm elevation but only 20-30 degrees of glenohumeral rotation. What’s the problem?
Rotator cuff tear
Thinking of the Deltoid-RTC relationship,
Acting on its own( without the RTC) the deltoids pull will result in translation in what direction?
a. superior
b. inferior
c. anterior
a. superior
Your patient has full passive external rotation (ER) with the arm at the side bit and is unable to produce any active ER. What is the source of the limitation?
infraspinatus torn/ ruptured
Which muscles are the primary external rotators?
infraspinatus and teres minor
Contracture of the dorsal radial carpal ligament results in a loss of flexion in the wrist
True
False
true
Contracture of the volar radial carpal ligament results in a loss of wrist extension.
true
false
true
The fiber direction of interosseous membrane allows force to be transferred from radius to ulna to shift load through humeroulnar joint.
True
False
true
Muscles that have distal attachments on radius have the potential to flex, extend, pronate, and supinate.
true
false
true
Maximal grip strength usually occurs at ____ degrees of wrist extension?
a. 15-20 degrees
b. 30-35 degrees
c. 40-45 degrees
b. 30-35
During gripping which two flexors generate a significant flexion torque that counteracts the activation of wrist extensors
FDS/FDP
Patients with radial nerve palsy, have damage to the radial nerve and experience wrist drop.
true
false
true
Mallet finger, refers to the patient’s inability to extend the DIP joint from a flexed position
True
False
True
Lumbricals are maximally lengthened in
______ position.
a. intrinsic plus
b. Intrinsic minus
b. intrinsic minus
MP joints extended and pip/dip flexed
Lumbricals are maximally shortened in
______ position.
a. intrinsic plus
b. Intrinsic minus
a. intrinsic plus
MP joints flexed pip/dip extended
Palmar interossei function is
a. abduciton
b. adduction
b. adduction
P.A.D.
The function of the dorsal interossei is
a. abduction
b. adduction
a. abduction
D.A.B
The radial head provides resistance to _______stress, if removed the elbow develops significant deformity
a. varus
b. valgus
b. valgus
What muscle allows us to put our arm behind our back?
Subscapularis
What is the primary stabilizer of the distal ulnar radial joint?
TFCC
If PROM is ____ then AROM there is a problem with muscle-tendon unit.
a. greater
b. less
c. the same as
a. greater
true or false - If PROM and AROM are roughly the same this means stiffness is the primary problem.
true
How many joints does the bicep brachii cross?
a. 1
b. 2
c. 3
c. 3
(proximal radial ulnar, elbow, shoulder)
Loss of wrist extensor muscle function would result in _____ grip strength.
a. decreased
b. increased
c. the same
a. decreased
What position should you immobilize the MP joints in?
a. extension
b. flexion
b. flexion
Injury to the flexor pulley system can lead to?
bowstringing
MCP joints in digits II-V are __ in flexion and ___ in extension.
a. taut, slack
b. slack, taut
a. taut, slack
The sole extrinsic flexor of DIP joints is the?
Flexor digitorum profundus FDP
The sole extrinsic flexor of the IP joints of the thumb is?
Flexor pollicus longus FPL
extrinsic extensors of EDC, EIP, and EDM insert into the sagittal bands. Their primary action is ______ of the MP joint
a. extension
b. flexion
a. extension
Additional role of sagittal bands is to
stabilize/centralize extensor tendons
over the MP joint
Loss of _____muscle function due to median and ulnar nerve injury results in the deformity commonly referred to as “ape hand”
a. extrinsic
b. intrinsic
b. intrinsic
The primary responsibility of the thenar muscles is to
position the thumb in varying
amounts of _____?
a. opposition
b. flexion
c. extension
a. opposition
Primary function of the hypothenar muscles is to “cup” the _____border of the
hand in order to deepen the concavity of the palm.
a. radial
b. ulnar
b. ulnar
Loss of function due to an ulnar nerve lesion in what muscle results in a drastic decrease in pinch strength?
a. adductor pollicis
b. lumbricals
c. extensor pollicis brevis
a. adductor pollicis
Radial collateral ligament is ___ during ulnar deviation.
a. taut
b. loose
taut
ECRL and FCR function synergistically to perform ______ deviation while simultaneously acting as antagonists by opposing each other extension/flexion potential
a. ulnar
b. radial
radial
Primary ulnar deviators are the
___ and _____
Flexor carpi ulnaris and extensor carpi ulnaris
Due to the normal valgus angle of the
elbow, a fall on an outstretched
arm results in significant stress
on the _____often resulting in
rupture
a. medial collateral ligament
b. lateral collateral ligament
Medial collateral ligament
Lateral collateral ligament provides ____ stability to the elbow
a. varus
b. valgus
a. varus
During axial loading, contact
between the radial head and
capitulum provides an important
bony resistance against _____
force.
a. valgus
b. varus
a. valgus
Three muscles involved in strong power grip are
Flexor digitorum profundus, interossei, extensor carpi radialis brevis