Thoracic Cavity and Temporomandibular Joint KIAS

The clavicular portion of the pectoralis major muscle CANNOT

A. aid in exhalation if the arms are overhead

During deep inspiration, the upper rib cage expands more in a(n) ____ direction and the lower rib cage expands more in a(n) ____ direction.

A. anterior; lateral

The central tendon of the diaphragm becomes stabilized by:

A. compression on the abdominal viscera

Muscles contracting during mandibular deviation to the right include:

A. left medial and lateral pterygoid

Muscles of mandibular elevation include:

A. masseter and temporalis

Muscles that can cause ipsilateral deviation.

A. masseter and temporalis

The "true ribs" are attached directly to the sternum anteriorly. These ribs include ribs:

B. 1 through 7

Which of the following muscles of inspiration were affected in this scenario?

B. Scalene

The seventh rib articulates with the ______ and ______ vertebral bodies.

B. fifth; seventh

Contraction of the diaphragm results in all the following EXCEPT:

B. negative pressure results on the abdominal viscera.

The manubriosternal joint is attached to rib:

B.2

Contraction of the diaphragm causes:

B.inhalation

Would a significant biomechanical difference be expected for the individual seated in the poor "kyphotic" posture? How would this effect the individual's ability to speak properly?

C. Yes; inspiratory capacity will be reduced, which will impact the person's ability to speak.

Actions of the medial pterygoid include:

C. elevates and contralaterally deviates

The structure that tethers the disc from moving too far anteriorly is the:

C. inferior retrodiscal lamina

The muscle that has attachments to the articular disc is the:

C. lateral pterygoid

The arthrokinematic motion during mandibular depression is ______ in the INFERIOR space and ______ in the SUPERIOR space.

C. roll; glide

Ribs 8 through 10 are "false ribs" because:

C. they do not attach directly to the sternum.

Which of the following muscles of expiration were affected in this scenario, causing the reduction in phonation?

D. Intercostal

The active contribution of the lateral pterygoid in relation to the disc is it:

D. eccentrically controls posterior translation of the disc during elevation.

Muscles NOT attached to the superior and inferior borders of the ribs.

D. outermost intercostal

With reciprocal clicking, the first click is ______ and the second is ______.

D. recapturing; dislocating

The costovertebral joint is an articulation between the ________ and the ________.

D. vertebral body; rib head