CSD 309 Laryngeal System Exam 4 || All Answers Are Correct 100%.
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Course
CSD 309 Laryngeal System
Institution
CSD 309 Laryngeal System
the primary structure of the Laryngeal system
A singular muscuolocartlaginous structure within the neck
Resides inferiorly to the hyoid bone and is attached to it by membranes
The trachea is immediately inferior to the larynx and is also attached to it by a membrane or ligament
The larynx is co...
CSD 309 Laryngeal System Exam 4 || All Answers Are
Correct 100%.
the primary structure of the Laryngeal system
A singular muscuolocartlaginous structure within the neck
Resides inferiorly to the hyoid bone and is attached to it by membranes
The trachea is immediately inferior to the larynx and is also attached to it by a membrane or
ligament
The larynx is composed of a total of 9 cartilages along with their connecting membranes and
ligaments correct answers larynx
Two types of functions of the larynx correct answers Biological function (primary functions) and
Non-biologic function (secondary function)
Biological function (primary functions) of the larynx correct answers 1. Keep foreign matter out
of lungs
It acts as a protective mechanism for the lower respiratory passageway
Prevents foreign objects from getting into the trachea, bronchi, and lungs
2. Expel foreign matter which try to enter the trachea/lungs
3. Stabilize thoracic cavity
To serve as a valve during thoracic fixation
AKA Valsalva maneuver "During this procedure, expired air is trapped beneath the adduct vocal
folds, generation increased abdominal and/or thoracic pressure. This increased pressure is used
by a person attempting to lift a heavy object, or by a person who may be straining to empty their
bladder or rectum
Non-biologic function (secondary function) of the larynx correct answers 1. Speech
To serve as the sound source for the human voice... the source of phonation for vocal activity
It does so by offering variable resistance to airflow coming from the lungs as expired air. As
expired air is forced through the adducted vocal folds, it sets them into vibration. The vibration
of the vocal folds is the sound source for voice
A U- or horseshoe-shaped bone in the superior region of the neck (superior to larynx) that is
suspended in place by a series of muscles attaching to it from structures above and below (it does
,not articulate with any other bone); the hyoid primarily serves as the base of the tongue, but it is
also bound to the larynx by the hyothyroid membrane
It is considered part of the tongue complex, serving as the point of attachment for several tongue
muscles coming from above ... muscles also make attachments to the hyoid from below
It is literally suspended in place by a total of 22 or 23 pairs of muscles
Functions of the hyoid bone:
Suspends the larynx
Attachment point for muscles
Supports the root of the tongue correct answers Hyoid bone
Parts/landmarks of the hyoid bone correct answers 1. Corpus (body)
2. 2 greater cornua (horns)
Project posteriorly and a little superiorly
3. 2 lesser cornua (horns)
Rise superiorly from the juncture of the corpus and greater cornua
The largest of the laryngeal cartilages, it articulates with and is immediately superior to the
cricoid cartilage correct answers Thyroid Cartilage
The Thyroid Cartilage is formed by correct answers 2 thyroid laminae fused at the midline
anteriorly, which forms the thyroid angle
the 2 prominent walls of the thyroid cartilage that meet anteriorly at midline and fuse almost
completely expect superiorly where the thyroid notch is formed correct answers thyroid laminae
a somewhat ill-defined ridge running diagonally along each thyroid lamina correct answers
Oblique line
the angle formed by the nearly complete union of the 2 lamina of the thyroid cartilage; in audible
males, this angle is approximately 90 degrees and in adult females, it is approximately 120
degrees correct answers thyroid angle
a prominent indention in the anterior midline of the thyroid cartilage, formed by the incomplete
fusion of the two thyroid laminae; Superior most part of thyroid angle correct answers thyroid
notch
A prominent protrusion of the thyroid cartilage anteriorly, immediately below the thyroid notch;
also known as the Adam's apple correct answers thyroid prominence
two long, narrow legs of cartilage extending superiorly from the posteriormost regions of the
thyroid laminae; they articulate with the greater cornua of the hyoid bone on each side
More slender, Longer; Project superiorly, posteriorly, and somewhat medially correct answers
Thyroid Cartilage Superior cornua (horns)
, two short, narrow legs of cartilage extending inferiorly from the posteriormost regions of the
thyroid laminae; they articulate with the cricoid cartilage on each side correct answers Thyroid
Cartilages Inferior cornua (horns)
The ring-shaped cartilage forming the base (lowermost border - most inferior portion) of the
larynx; it articulates with the thyroid cartilage and the arytenoid cartilages correct answers
cricoid cartilage
2 parts of the cricoid cartilage correct answers 1. anterior arch
2. posterior quadrate lamina
lies immediately below the angle of the thyroid. the narrower, anterior portion of the cricoid
cartilage correct answers anterior arch
somewhat broad so that it occupies a portion of the open space in the posterior region of the
thyroid cartilage. the broader posterior portion of the cricoid cartilage that projects superiorly to
occupy some of the open space in the posterior inner region of the thyroid cartilage correct
answers posterior quadrate lamina
Cricoid Cartilage 3 landmarks correct answers 1. Pair of oval articular facets along the lateral
margin of the cricoid where the anterior arch ends and the posterior quadrate lamina begins
The point of articulation of the cricoid cartilage with the inferior cornua (horns) of the thyroid
cartilage, forming the cricothyroid joints
2. Vertically oriented ridge
Along midline of posterior quadrate lamina
2 shallow depressions on either side of the ridge
3. Pair of articular facets along the superior surface of the posterior quadrate lamina
Serve as the point of articulation of the cricoid cartilage with the arytenoid cartilages
2 somewhat pyramid-shaped cartilages that rest upon the sloping borders of the posterior
quadrate lamina of the cricoid cartilages; the posterior attachment of the vocal folds in the vocal
processes at the base of these cartilages correct answers Arytenoids
most mobile paired laryngeal cartilages correct answers arytenoid cartilage
Arytenoid Cartilage resemble 3 sides pyramid correct answers 1. Medial surfaces
Medical surfaces of the arytenoids face each other
2. Posterior surfaces
On the same plane as the posterior quadrate lamina of the cricoid
Medial and posterior surfaces of each arytenoid are at a 90-degree angle
3. Anterolateral surface:
From medial surface to the posterior surface
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