Humeral Movement and Joint Mechanics

This video tutorial explores the arthrokinematics of the glenohumeral joint, which has three degrees of freedom, allowing movement in the sagittal, frontal, and transverse planes. The video details how the humerus moves during flexion, extension, abduction, adduction, and internal and external rotation. A clinical scenario is presented, involving a student with shoulder pain, to demonstrate the practical application of these concepts. The video concludes with a call to action for viewers to like and subscribe.

What are the three cardinal planes in which the glenohumeral joint moves?

• Coronal, Horizontal, Vertical

• Sagittal, Frontal, Transverse

• Anterior, Posterior, Lateral

• Diagonal, Lateral, Medial

In the sagittal plane, what happens to the humerus during flexion?

• It rolls anterior and glides posterior

• It spins posterior

• It rolls superior and glides inferior

• It spins anterior

During extension in the sagittal plane, how does the greater tubercle move?

• Posteriorly

• Anteriorly

• Superiorly

• Inferiorly

What is the movement of the humerus during abduction in the frontal plane?

• Rolls posterior and glides anterior

• Rolls superior and glides inferior

• Rolls anterior and glides posterior

• Rolls inferior and glides superior

In the frontal plane, what is the direction of the humerus glide during adduction?

• Superior

• Inferior

• Posterior

• Anterior

During internal rotation in the transverse plane, how does the humerus move?

• Rolls inferior and glides superior

• Rolls posterior and glides anterior

• Rolls superior and glides inferior

• Rolls anterior and glides posterior

What is the movement of the humerus during external rotation in the transverse plane?

• Rolls anterior and glides posterior

• Rolls superior and glides inferior

• Rolls posterior and glides anterior

• Rolls inferior and glides superior

In the clinical scenario, which direction should the humerus be mobilized to improve abduction?

• Superior

• Inferior

• Anterior

• Posterior

To regain external rotation in the clinical scenario, which direction should the humerus be mobilized?

• Inferior

• Posterior

• Anterior

• Superior

What was the limitation in Sally's shoulder range of motion?

• Abduction limited to 150 degrees and external rotation limited to 50 degrees

• Abduction limited to 150 degrees and internal rotation limited to 50 degrees

• Flexion limited to 150 degrees and extension limited to 50 degrees

• Internal rotation limited to 150 degrees and external rotation limited to 50 degrees