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Anatomy of the Hand: Metacarpal Bones and Articulations

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Anatomy of the Hand: Metacarpal Bones and Articulations

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Questions and Answers

During the 4th week of intrauterine life, a pair of small elevations known as limb buds appear on the ventrolateral aspect of the embryo. Where do the anterior pair of upper limb buds appear?

Opposite the lumbar and upper sacral segments

Opposite the lower cervical segments (correct)

At the lumbar and upper sacral segments

At the lower cervical segments

Why are the upper and lower limbs initially described as flipper-like appendages during an early stage of development?

They have preaxial and postaxial borders (correct)

They have proximal, middle, and distal segments

They have similar dorsal and ventral surfaces

They have the same number of fingers and toes

What is the homologous part of the upper limb to the thigh in the lower limb?

Elbow joint

Shoulder/pectoral girdle

Forearm

Arm (correct)

Where do the posterior pair of lower limb buds appear during limb development?

At the lumbar and upper sacral segments (C) Signup and view all the answers

What is the homologous part of the upper limb to the hip joint in the lower limb?

Shoulder joint (C) Signup and view all the answers

What defines the preaxial border of both upper and lower limbs during early development?

Facing towards the head (C) Signup and view all the answers

How many metacarpal bones are in the hand?

Five (B) Signup and view all the answers

What is the numbering order of the metacarpal bones from lateral to medial side?

One to five (A) Signup and view all the answers

Which part of the hand do metacarpophalangeal joints connect?

Metacarpals and proximal phalanges (B) Signup and view all the answers

What makes the first carpometacarpal joint unique in terms of movements?

It has a separate joint cavity (C) Signup and view all the answers

How many digits are in the hand (excluding the thumb)?

Four (D) Signup and view all the answers

Which limb part attaches the limb to the trunk?

Limb girdle (B) Signup and view all the answers