Bones Of The Forearm- Ulna

BONES OF THE FOREARM- ULNA

Q. 1

Superior radioulnar joint is:

 A

Hinge joint

 B

Ball and socket joint

 C

Pivot joint

 D

Saddle joint

Q. 1

Superior radioulnar joint is:

 A

Hinge joint

 B

Ball and socket joint

 C

Pivot joint

 D

Saddle joint

Ans. C

Explanation:

Pivot joint


Q. 2

Superior radioulnar joint is?

 A

Hinge joint

 B

Pivot joint

 C

Saddle joint

 D

Ball and socket joint

Q. 2

Superior radioulnar joint is?

 A

Hinge joint

 B

Pivot joint

 C

Saddle joint

 D

Ball and socket joint

Ans. B

Explanation:

The radius and the ulna are connected at their upper and lower extremities by synovial joints, termed the superior and inferior radio-ulnar joints.The superior radio ulnar joint is a pivot-joint between the circumference of the head of the radius and the osseofibrous ring formed by the radial notch of the ulna and the annular ligament. The inferior radio ulnar joint is a pivot-joint formed between the head of the ulna and the ulnar notch of the lower end of the radius;

Joints: A joint or place of articulation is formed where 2 or more bones come inclose contact in the body and are attached to each other by ligaments or cartilage

Classification of joints: The articulations are divided into three classes: synarthroses or immovable, amphiarthroses or slightly movable, and diarthroses or freely movable.

Classes Types Examples

FIBROUS JOINTS (SYNARTHROSES)

 

   SUTURES

 

SYNDESMOSES

 

GOMPHOSES

Cranial sutures

 

Inferior tibiofibular joint

 

Bone and socket joint

CARTILAGINOUS JOINTS (AMPHIARTHROSES)

 

SYNCHONDROSES (Hyaline cartilage)

 

SYMPHYSES (Fibrocartilage)

Epiphyseal plates

 

Pubic symphesis

SYNOVIAL JOINTS (DIARTHROSES)

UNIAXIAL

GINGLYMUS (Hinge)

TROCHOID (Pivot)

 

BIAXIAL

CONDYLOID or ELLIPSOID

 

SADDLE

 

TRIAXIAL

BALL AND SOCKET

PLANAR

Elbow and interphalangeal joints

 

Superior and inferior radioulnar joint

Radiocarpal (wrist) joints, and metacarpophalangeal joints

Carpometacarpal joint of thumb

Shoulder and hip joint

Intercarpal and intertarsal joints


Q. 3

A 6 year old child has an accident and had # elbow, after 4 years presented with tingling and numbness in the ulnar side of finger, fracture is

 A

supra condylar # humerus

 B

lateral condylar # humerus

 C

olecranon #

 D

dislocation of elbow

Q. 3

A 6 year old child has an accident and had # elbow, after 4 years presented with tingling and numbness in the ulnar side of finger, fracture is

 A

supra condylar # humerus

 B

lateral condylar # humerus

 C

olecranon #

 D

dislocation of elbow

Ans. B

Explanation:

B i.e. Lateral condyle


Q. 4

In Monteggia fracture, which is true about ulnar fracture and head of radius

 A

Both ulnar fracture and head of radius is displaced posteriorly

 B

Both ulnar fracture and head of radius is displaced anteriorly

 C

Ulnar fractures is posteriorly and head of radius is displaced anteriorly

 D

Ulnar fracture is anteriorly and head of radius is displaced posteriorly

Q. 4

In Monteggia fracture, which is true about ulnar fracture and head of radius

 A

Both ulnar fracture and head of radius is displaced posteriorly

 B

Both ulnar fracture and head of radius is displaced anteriorly

 C

Ulnar fractures is posteriorly and head of radius is displaced anteriorly

 D

Ulnar fracture is anteriorly and head of radius is displaced posteriorly

Ans. B

Explanation:

B i.e. Both ulnar fracture and head of radius is displaced anteriorly


Q. 5

The treatment of choice of fracture of radius and ulna in a an adult is:

 A

Plaster for 4 weeks

 B

Closed reduction and calipers

 C

Only plates

 D

Kuntscher nails

Q. 5

The treatment of choice of fracture of radius and ulna in a an adult is:

 A

Plaster for 4 weeks

 B

Closed reduction and calipers

 C

Only plates

 D

Kuntscher nails

Ans. C

Explanation:

C i.e. Only plates

  • Fracture both bones of forearm may result in severe loss of function unless adequately treated by restoring normal relationship of radius and ulnaQ. The relationship of radio humeral, ulno humeral, proximal radioulnar, radio carpal and distal radioulnar joints and the interosseous space must be anatomical or some functional impairment will occur.
  • In addition to regaining length, and axial alignment (by reducing angulation) , achieving normal rotational alignment is necessary if a good, range of pronation & supination is to be restored.
  • Forearm rotation is vulnerable to any malalignment of radius and accurate rotational as well as axial reduction is necessary
  • Malunion and nonunion occur more frequently because of the difficulty in reducing and maintaing the reduction of two parallel bones in the presence of pronating and supinating muscles that have angulating and rotational influences
  • Because of these factors OR&IF (by plating)Q of displaced diaphyseal fractures in adult is accepted as best method of treatment.

Q. 6

A patient presented with a history of fall on outstretched hand. There is pain & swelling over the radial aspect of the wrist without any obvious deformity. Radial styloid process is at a lower level than the ulnar styloid process. Tenderness can be elicited in anatomical snuff box. Findings are consistent with the diagnosis of:           

March 2013 (e)

 A

Fracture scaphoid

 B

Fracture Colle’s

 C

Fracture pisiform

 D

Wrist osteoarthritis

Q. 6

A patient presented with a history of fall on outstretched hand. There is pain & swelling over the radial aspect of the wrist without any obvious deformity. Radial styloid process is at a lower level than the ulnar styloid process. Tenderness can be elicited in anatomical snuff box. Findings are consistent with the diagnosis of:           

March 2013 (e)

 A

Fracture scaphoid

 B

Fracture Colle’s

 C

Fracture pisiform

 D

Wrist osteoarthritis

Ans. A

Explanation:

Ans. A i.e. Fracture scaphoid

Scaphoid

  • Only carpal bone to undergo fracture as well as AVN: Scaphoid
  • Fragment undergoing necrosis in fracture scaphoid: Proximal
  • MC site of fracture scaphoid: Waist

Q. 7

Ossification center of upper end of ulna is united by:          

DNB 10

 A

9 years

 B

11 years

 C

14 years

 D

16 years

Q. 7

Ossification center of upper end of ulna is united by:          

DNB 10

 A

9 years

 B

11 years

 C

14 years

 D

16 years

Ans. D

Explanation:

Ans. 16 years


Q. 8

Olecranon process of ulna helps in formation of‑

 A

Radial notch

 B

Trochlear notch

 C

Olecranon fossa

 D

Coronoid fossa.

Q. 8

Olecranon process of ulna helps in formation of‑

 A

Radial notch

 B

Trochlear notch

 C

Olecranon fossa

 D

Coronoid fossa.

Ans. B

Explanation:

Ans. is ‘b’ i.e., Trochlear notch

  • Inner surface of olecranon process forms trochlear notch for articulation of trochlea of humerus.
  • Radial notch is seen in lateral part of upper end of shaft (not on olecronon).
  • Olecranon fossa and coronoid fossa are part of lower end of humerus.

Q. 9

In the type of fracture shown below, which among the following is true about ulnar fracture and head of radius ? 

 A

Both ulnar fracture and head of radius is displaced posteriorly.

 B

Both ulnar fracture and head of radius is displaced anteriorly.

 C

Ulnar fractures is posteriorly and head of radius is displaced anteriorly.

 D

Ulnar fracture is anteriorly and head of radius is displaced posteriorly.

Q. 9

In the type of fracture shown below, which among the following is true about ulnar fracture and head of radius ? 

 A

Both ulnar fracture and head of radius is displaced posteriorly.

 B

Both ulnar fracture and head of radius is displaced anteriorly.

 C

Ulnar fractures is posteriorly and head of radius is displaced anteriorly.

 D

Ulnar fracture is anteriorly and head of radius is displaced posteriorly.

Ans. B

Explanation:

The fracture shown in the picture above represents Monteggia fracture.

 In Monteggia fracture, both ulnar fracture and head of radius is displaced anteriorly.



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