PTA Geography Knowledge 4

Question 1

The glenohumeral joint is classified as which type of synovial joint?

Accepted Answer

Ball-and-socket joint

Answer

The glenohumeral joint is a ball-and-socket synovial joint, allowing multi-axial movement in all planes.

Question 2

Which carpal bone articulates directly with the radius at the radiocarpal joint?

Accepted Answer

Scaphoid

Answer

The scaphoid (and lunate) articulates with the radius to form the radiocarpal (wrist) joint on the lateral side.

Question 3

The atlanto-axial joint allows which primary movement of the cervical spine?

Accepted Answer

Rotation

Answer

The C1-C2 (atlanto-axial) joint is a pivot joint that permits approximately 50% of cervical rotation.

Question 4

Which joint connects the axial skeleton to the upper extremity?

Accepted Answer

Sternoclavicular joint

Answer

The sternoclavicular joint is the only true bony articulation between the upper limb and the axial skeleton.

Question 5

The subtalar (talocalcaneal) joint primarily allows which motion?

Accepted Answer

Inversion and eversion

Answer

The subtalar joint between the talus and calcaneus is the primary joint responsible for inversion and eversion of the foot.

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