Anatomy Exam III

The function of the central band in the extensor expansion is to _______________ while the function of the lateral band is to ______________. a. Extend PIP; extend DIP b. Extend MCP; extend PIP c. Extend DIP; extend PIP d. Extend MCP; extend DIP

a. Extend PIP; extend DIP

In order to obtain flexion at your distal interphalangeal joint, you need to activate which muscle? a. Flexor digitorum profundus b. Flexor digitorum superficialis c. Palmaris longus d. Flexor pollicis longus

a. Flexor digitorum profundus

Which one of these deep muscles of the anterior forearm is NOT innervated by the Anterior Interosseous Nerve? a. Pronator quadratus b. Flexor digitorum profundus c. Flexor digitorum superficialis d. Flexor pollicis longus

c. Flexor digitorum superficialis

Which of the following muscle tendons make up the borders of the anatomical snuff box? a. Medial border is EPB; Lateral border is EPL and APB b. Medial border is APL; Lateral border is EPB and EPL c. Medial border is EPL; Lateral border is APL and EPB d. Medial border is APL and EPB; Later border is EPL

c. Medial border is EPL; Lateral border is APL EPB

A sensory test of the forearm reveals numbness directly down the middle of the posterior forearm. What nerve may be injured? a. Lateral antebrachial cutaneous b. Medial antebrachial cutaneous c. Posterior antebrachial cutaneous d. Musculocutaneous nerve

c. Posterior antebrachial cutaneous

Which bones make up the carpo-metacarpal (CMC) joint of the thumb? a. Metacarpal of fifth digit & trapezoid b. Metacarpal of first digit & triquetrum c. Metacarpal of fifth digit & triquetrum d. Metacarpal of first digit & trapezium

d. Metacarpal of first digit & trapezium

Which of the following is not associated with Guyon's canal (aka the ulnar canal)? a. Pisohamate ligament b. Hamate c. Pisiform d. Radial nerve

d. Radial nerve

Your patient sustained an injury to the median nerve. Which of the following thenar muscles will not be impacted by the injury? A. Adductor pollicis B. Flexor pollicis brevis C. Abductor pollicis brevis D. Opponens pollicis E. All of the above muscles will be impacted by the injury

A. Adductor pollicis

Which of the following ligaments limits extension at the IP joints of the digits? A. Lateral (radial) and medial (ulnar) collateral ligaments B. Palmar ligaments (aka volar plates) C. Anular ligaments D. Cruciate ligaments E. None of the above

B. Palmar ligaments (aka volar plates)

Which of the following movements are possible at the MP/MCP joints of the fingers? A. Flexion/Extension B. Abduction/Adduction C. Opposition/Reposition D. Both A and B E. All of the above

D. Both A and B

Your patient sustained an injury to the radial nerve above the elbow joint. Which pattern of sensory loss would you expect to see with respect to the forearm? A. Sensory impairments over the lateral aspect of the posterior forearm B. Sensory impairments over the medial aspect of the posterior forearm C. Sensory impairments over the entire posterior aspect of the forearm D. None of the above

D. None of the above

Repetitive wrist flexion and extension at the wrist joint, couple with active gripping can result in which syndrome? a. Carpel tunnel b. Dequervain's disease c. Wrist drop

a. Carpel tunnel

In the flexor-pronator muscle group, the only muscle that makes up the intermediate layer is ________: a. Flexor digitorum superficialis b. Flexor digitorum profundus c. Flexor carpi ulnaris d. Pronator quadratus

a. Flexor digitorum superficialis

You ask a patient to extend their wrist and provide slight resistance by pushing on the dorsum of the hand on the metacarpals. What injury would you be testing for? a. Lateral epicondylitis b. Carpel tunnel syndrome c. Carpal bone fracture d. Brachioradialis tendon rupture

a. Lateral epicondylitis

With regards to the fibrous digital sheaths, the A1, A3, and A5 pulleys anchor directly to _____________ and are critical to stability. a. MCP, PIP, and DIP joints b. Cruciate ligaments c. Bones in fingers

a. MCP, PIP, and DIP joints

The posterior interosseous nerve is a branch of which nerve? a. Radial nerve b. Median nerve c. Ulnar nerve d. Anterior interosseous nerve

a. Radial nerve

You palpate the space between the 1st and 3rd dorsal compartment and your patient winces in pain when you apply pressure. What structure do you suspect to be injured? a. Scaphoid b. Pisiform c. Ulnar nerve d. TFCC

a. Scaphoid

An injury to the radial nerve above the level of the elbow can result in the clinical finding of wrist drop. a. True b. False

a. True

Palmar ligaments are most important at PIP and DIP joints because if they rupture, you will get hyperextension. a. True b. False

a. True

The deep branch of the radial nerve innervates the extensor carpi radialis brevis. a. True b. False

a. True

The function of the lumbricals 1-4 includes flexion at the MCPs and extension of the IPs. a. True b. False

a. True

The pisohamate ligament converts area underneath into a tunnel for the ulnar nerve. a. True b. False

a. True

If a patient has an infection in his or her thumb, it can travel and present in the wrist because the synovial tendon sheath from the thumb to the wrist is continuous. a. True b. False

a. True (for the middle digits, it will be contained unless the bursa ruptures!)

The _____________ _____________ is formed by the carpal bones posteriorly and the transverse carpal ligament anteriorly. It contains tendons of FDP (4), tendons of FDS (4), tendon of FPL, and the median nerve. a. carpal tunnel b. extensor expansion c. guyon's canal d. interosseous membrane

a. carpal tunnel

Which artery lies in the floor of the anatomical snuff box? a. radial b. brachial c. median d. ulnar

a. radial

In terms of wrist movements, abduction is otherwise known as ___________ deviation and adduction is known as ____________ deviation. a. radial, ulnar b. ulnar, radial c. medial, lateral d. none of the above

a. radial, ulnar

Which muscles of the posterior compartment of the forearm are innervated by the Radial Nerve "proper"? a. Extensor Carpi Radialis Brevis & Extensor Digitiorum b. Brachioradialis & Extensor Carpi Radialis Longus c. Supinator & Brachioradialis d. Extensor Carpi Ulnaris & Extensor Carpi Radialis

b. Brachioradialis & Extensor Carpi Radialis Longus

A client has normal extension of the CM and MP joint of the thumb. However, they are not able to extend the IP joint of the thumb. Which is structure for concern? a. Abductor pollicis longus b. Extensor pollicis longus c. Extensor pollicis brevis d. Extensor carpi radialis brevis

b. Extensor pollicis longus

Damage to the deep branch of the ulnar nerve results in an inability to extend the DIPs of the digits 1-4 a. True b. False

b. False

The Flexor digitorum superficialis is innervated by both the median and ulnar nerves. a. True b. False

b. False

The radial nerve provides some motor supply in the hand. a. True b. False

b. False

A patient's shoulder is likely more stable after a reverse shoulder arthroplasty in comparison to a typical shoulder arthroplasty. a. True b. False

b. False (more unstable because there are no longer primary dynamic stabilizers attached)

The palmar cutaneous branch of the median nerve runs below the transverse carpal ligament. a. True b. False

b. False (it runs above!)

The MCP joints of digits 2-5 are hinge joints, meaning they only flex and extend. a. True b. False

b. False (the MCP joint of the thumb only flexes and extends)

The collateral ligaments are taut when your fingers are in which position? a. Opposition b. Flexion c. Extension d. MP extension and IP flexion

b. Flexion

Which muscle flexes & adducts (ulnar deviation) the hand at the wrist joint? a. Flexor carpi radialis b. Flexor carpi ulnaris c. Flexor digitorum superficialis d. Flexor digitorum profundus

b. Flexor carpi ulnaris

You ask your patient to make the OK symbol with the I & II digits because you suspect an anterior interosseous nerve injury. Which two muscles are you specifically testing? a. Extensor pollicis longus & Abductor pollicis longus b. Flexor Pollicis longus & Flexor digitorum profundus c. Pronator quadratus & Pronator teres d. Flexor carpi radialis & Flexor digitorum superficialis

b. Flexor pollicis longus & flexor digitorum profundus

All of the following are true regarding the divisions of the median nerve in the hand EXCEPT: a. Median nerve supplies the distal aspect of the middle fingers b. Median nerve is the motor supply to the hypothenar eminence c. Median nerve supplies the thenar eminence, half of the ring finger and mid-palm on the palmer surface d. Median nerve does not supply the proximal aspect of the thumb, index and middle finger on the dorsum side of hand

b. Median nerve is the motor supply to the hypothenar eminence

Your patient required a reverse shoulder arthroplasty due to an irreparable RTC defect. You would expect to see which of the following deficits after the surgery? a. Patient would be unable to lift arm above her head. b. Patient would be unable to get her arm behind her back c. Patient would likely experience paralysis of the entire limb. d. all of the above

b. Patient would be unable to get her arm behind her back (b/c rotator cuff muscles are no longer attached)

The brachioradialis muscle has maximum action when the forearm is in mid-position. a. True b. False

b. True

Your patient suffered from a 4-part proximal humeral fracture. The clinician should test the deltoid to check for what type of potential nerve palsy? a. radial nerve palsy b. axillary nerve palsy c. median nerve palsy d. ulnar nerve palsy

b. axillary nerve palsy

Which muscle is the only elbow flexor innervated by the radial nerve? a. supinator b. brachioradialis c. pronator teres d. pronator quadratus

b. brachioradialis

Which muscle is the only muscle in the extensors group that acts on the elbow and does not cross the wrist? a. supinator b. brachioradialis c. extensor carpi ulnaris d. extensor carpi radialis longus

b. brachioradialis

What are the three extensor muscles that contribute to the extensor hood? a. extensor digitorum, extensor pollicis longus, extensor pollicis brevis b. extensor digitorum, extensor digiti minimi, extensor indicis c. extensor pollicis longus, extensor pollicis brevis, extensor indicis d. none of the above

b. extensor digitorum, extensor digiti minimi, extensor indicis

The sensory distribution of the ulnar nerve with respect to the palmer surfaces of the hand includes which of the following? a. thenar eminence and thumb b. hypothenar eminence, half of ring finger and pinky c. lateral aspect of the thumb and pinky d. hypothenar eminence and half of ring finger

b. hypothenar eminence, half of ring finger and pinky

Which of the following ligaments prevents excessive ulnar deviation (adduction) at the radiocarpal joint? A. Ulnar collateral ligament B. Radial collateral ligament C. Palmar radiocarpal ligaments D. Dorsal ulnocarpal ligaments

b. radial collateral ligament

Which of the following innervates majority of the muscles of the thenar eminence? a. digital branch of ulnar nerve b. recurrent branch of median nerve c. digital branch of the median nerve d. recurrent branch of the radial nerve

b. recurrent branch of the median nerve

Which of the following muscles is NOT part of the boundary of the anatomical snuff box? a. Extensor pollicis longus b. Abductor pollicis longus c. Abductor pollicis brevis d. Extensor pollicis brevis

c. Abductor pollicis brevis

The 1st dorsal compartment contains the tendons of which muscle(s)? a. Extensor carpi ulnaris b. Extensor digitorum and extensor indicis c. Abductor pollicis longus and extensor pollicis brevis d. Extensor pollicis longus

c. Abductor pollicis longus and extensor pollicis brevis

Which of the following statements is true regarding the Pronator quadratus? a. It acts on both the elbow and the wrist b. An example of its action is bring a cup of juice to your mouth c. An example of its action is using your left hand to open a doorknob to right d. It receives innervation from the radial nerve alone

c. An example of its action is using your left hand to open a doorknob to right

Which of the following innervates the hypothenar group of muscles? a. Recurrent brand of the median nerve b. Deep branch of the radial nerve c. Deep branch of the ulnar nerve d. Anterior interosseous nerve

c. Deep branch of the ulnar nerve

Which superficial posterior forearm muscle does not originate on the lateral epicondyle? a. Extensor carpi radialis brevis b. Extensor digitorum c. Extensor carpi radialis longus d. Extensor digiti minimi

c. Extensor carpi radialis longus

You read in a patient's chart that they sustained an injury to the ulnar nerve. When you ask the patient to flex their wrist, what do you expect to see? a. A complete inability to flex the wrist b. Flexion at the wrist with ulnar deviation c. Flexion at the wrist with radial deviation d. Smooth flexion with no lateral movement

c. Flexion at the wrist with radial deviation

Your patient sustains an injury resulting in a complete severance of their median nerve. Which of the following presentations do you expect to see with regards to sensory loss? a. Loss of sensation on their palmer surface of the hypothenar eminence ad half of the ringer finger and pinky finger b. Lateral aspect of thumb only c. Thenar eminence of the thumb, middle palm, index and middle finger, and half of the ring finger on the palmer surface of the hand d. Middle of the palm and the index, middle and ring fingers

c. Thenar eminence of the thumb, middle palm, index and middle finger, and half of the ring finger on the palmer surface of the hand

Where do the central and terminal tendons of the extensor expansion insert? a. lateral aspect of middle phalanx b. lateral aspect of middle and distal phalanx c. base of middle and distal phalanx d. base of middle phalanx

c. base of the middle and distal phalanx

A patient reports pain with stretching of the tendons in the 1st dorsal compartment and are also experiencing decreased thumb abduction and extension. They are likely suffering from what? a. carpal tunnel syndrome b. lateral epicondylitis c. dequervain's disease d. wrist drop

c. dequervain's disease

The posterior, or medial, boundary of the anatomical snuff box is _______: a. abductor pollicis longus b. extensor pollicis brevis c. extensor pollicis longus d. extensor digitorum

c. extensor pollicis longus

In the cubital fossa, the radial nerve divides into: a. posterior and anterior branches b. medial and lateral branches c. superficial and deep branches d. brachial and antebrachial branches

c. superficial and deep branches

The common flexor tendon sheath of flexor digitorum superficialis and profundus is the _______ bursa ,whereas the ________bursa is the synovial sheath for the tendon of flexor pollicis longus. a. medial, lateral b. lateral, medial c. ulnar, radial d. radial, ulnar

c. ulnar, radial

A positive Finkelstein's test would indicate tenosynovitis to which structure? a. 3rd dorsal compartment b. Posterior interosseous nerve c. Anterior interosseous nerve d. 1st dorsal compartment

d. 1st dorsal compartment

The palmar interossei muscles are responsible for which action? a. Abduction of digits b. Both abduction and adduction of the digits c. Opposition of thumb d. Adduction of digits

d. Adduction of digits

Which muscle contribute to the extensor expansion of the digits? a. Lumbricals b. Palmar Interossei c. Dorsal Interossei d. All of the above

d. All of the above

Which of the following nerves supply the cutaneous innervation to the posterior aspect of the forearm? a. Posterior antebrachial cutaneous nerve b. Medial antebrachial cutaneous nerve c. Lateral antebrachial cutaneous nerve d. All of the above

d. All of the above

When picking up a glass of water from the table and bringing it to your mouth, which muscle is activating most strongly? a. Briceps brachii b. Triceps brachii c. Brachialis d. Brachioradialis

d. Brachioradialis

Which of the following statements regarding the ligaments of the IP joints is FALSE? a. Collateral ligaments run along the sides of the IP joints b. Palmar ligaments are also known as volar plates c. Volar plates protects IP joints from hyperextension d. Collateral ligaments become lax during flexion

d. Collateral ligaments become lax during flexion

Which of the following flexor-pronator muscles is contained in the deep layer of the anterior forearm? a. Flexor Carpi Radialis b. Flexor Carpi Ulnaris c. Flexor Digitorum Superficialis d. Flexor Digitorum Profundus

d. Flexor Digitorum Profundus

If a person damaged their median nerve at the level of the cubital fossa, which of the following muscles would be affected? a. Abductor pollicis longus b. Supinator c. Brachioradialis d. Flexor Digitorum Superficialis

d. Flexor Digitorum Superficialis

What is the only muscle completely innervated by the ulnar nerve? a. opponens pollicis b. abductor pollicis c. flexor pollicis brevis d. adductor pollicis

d. adductor pollicis

The carpal tunnel contains: a. the radial nerve, the tendons of flexor digitorum profundus, the tendons of flexor pollicis longus, and the tendons of flexor digitorum superficialis b. the median nerve, the tendons of flexor digitorum, the tendons of flexor pollicis longus, and the tendons of flexor pollicis brevis c. the radial nerve, the tendons of extensor digitorum, the tendons of extensor carpi ulnaris, and the tendons of extensor pollicis longus d. the median nerve, the tendons of flexor digitorum profundus, the tendons of flexor pollicis longus, and the tendons of flexor digitorum superficialis

d. the median nerve, the tendons of flexor digitorum profundus, the tendons of flexor pollicis longus, and the tendons of flexor digitorum superficialis

Flexor digitorum profundus is innervated by two nerves. The medial part is innervated by the _______ nerve and the lateral part is innervated by the __________ nerve. a. radial, ulnar b. median, ulnar c. posterior interosseous, median d. ulnar, anterior interosseous

d. ulnar, anterior interosseous