W. R. Zemlin Memorial Web Site
Larynx Part Two
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Home • Larynx
1 • Larynx 2 • Central
Nervous System • Skull • Respiratory
System
Graphic version
Home • Larynx
1 • Larynx
2 • Central Nervous
System • Skull • Respiratory
System
Note: Slide titles link to associated graphic slide pages.
Slide 1:
Posterior lateral view
demonstrating posterior cricoarytenoid, arytenoideus, and cricothyroid muscles.
Slide 2
Lateral view with thyroid
lamina removed demonstrating posterior and lateral cricoarytenoids, and thyroarytenoid
muscles.
Slide 3
Lateral view with thyroid
lamina removed, demonstrating lateral cricoarytenoid (LCA), thyroarytenoid
(TA), and superior thyroarytenoid (STA) which occurs in about
33% of the population.
Slide 4
Superior thyroarytenoid
muscle.
Slide 5
Schematic of presumed actions
of extrinsic muscles.
Slide 6
Inferior (stained)
and middle pharyngeal constrictor as seen
from behind.
Note that the inferior most fibers course horizontally. These constitute the cricopharyngeus muscle which functions as a pseudoglottis in esophageal speech.
Slide 7
Oblique tendon and inferior
pharyngeal constrictor.
Slide 8
Thyrohyoid — note lower attachment
on inferior border of thyroid cartilage.
Slide 9
Sternothyroid sectioned
and reflected.
Note continuation of fibers into inferior pharyngeal constrictor.
Slide 10
Reflected sternothyroid.
Note continuation of deep fibers into inferior pharyngeal constrictor.
Slide 11
Another example of continuation
of deep fibers of sternothyroid into inferior pharyngeal constrictor.
Slide 12
Thyrohyoid (stained)
attached to thyroid gland (green). This is not an example of levatores
thyroideus.
Slide 13
Neck dissection demonstrating
sternohyoid (SH) muscle, omohyoid (OH) muscle, common carotid
artery (red), carotid sinus, internal and external carotid arteries,
hypoglossal (H) and vagus (V) nerves, and juglar (J) vein.
Slide 14
Bilateral levatores thyroideus
muscles (anomaly.)
Slide 15
Neck dissection demonstrating
sternohyoid muscle, internal jugular vein, carotid artery, brachial plexus,
subclavian artery and vein, and the vagus nerve.
Slide 16
Blood supply to larynx,
right side, through the thyrohyoid membrane.
Slide 17
Blood supply to larynx,
left side (same specimen as in previous slide.)
Superior laryngeal artery
and vein enter through
formaen thyroideum.
Slide 18
Frontal section through
larynx.
Note continuity of thyroarytenoid (TA), lateral cricoarytenoid (LCA), and cricothyroid (CT) muscles. This section demonstrates the ventricular fold (VF) and ventrical (V). Note also, no division of thyroarytenoid into vocalis and thyromuscularis muscles.
Slide 19
Frontal section demonstrating
extent of saccule of ventricle.
Slide 20
Thyroid angle measurements.
Slide 21
Example of thyroid angle
68° in a male adult.
Slide 22
Superior-middle-inferior
thyroid angles for five subjects, two male and three female.
Slide 23
Superior-middle-inferior
thyroid angles for five subjects, three male and two female.
Slide 24
Superior-middle-inferior
thyroid angles for ten subjects, five male and five female.
Slide 25
Graph illustrating lack
of correlation between thyroid laminae angle and vocal fold length.
Note — separate correlations must be calculated for male and female populations.
Slide 26
Graph illustrating lack
of correlation between thyroid laminae angle and vocal fold length. Note —
separate correlations must be calculated for male and female populations.
Slide 27
Top view of an undissected
larynx. Note assynnetry in a
68-year-old female.
Slide 28
Laryngeal oddity in an
adult female.
Slide 29
Newborne infant larynx,
frontal view. Note squat configuration.
Slide 30
Newborn infant larynx from
behind.
Slide 31
Same specimen as in slide
29 and 30, but as seen from above. Typical thyroid configuration.
Slides 32 - 45
One cycle of vocal fold
vibration taken with phase determinable laryngeal stroboscopy. Technique developed
and photographs furnished by Dr. Gunnar Buggren, Stockholm, Sweden.
Slides 32 – 45
Slide 46
Forced inhalation of a
young adult female.
Slide 47
Forced inhalation.
Slide 48
Normal phonation of a young
adult female.
Slide 49
Normal phonation of a middle-aged
male.
Slide 50
Falsetto.
Slide 51
Laryngeal whistle. Vocal
folds do not appear to be vibrating in
this register.
Slide 52
Laryngeal whistle. Note
sharp edges of vocal folds.
Slide 53
Quiet inhalation.
Slide 54
Low pitch.
Slide 55
Conversational pitch. Note
changes in vocal fold length and thickness as pitch changes.
Slide 56
Medium pitch.
Slide 57
High pitch.
Slide 58
Falsetto.
Slide 59
Aspirate.
Slide 60
Whisper-compare with classical
descriptions.
Slide 61
Forced whisper.
Slide 62
Nodule as it appears during
quiet breathing.
Slide 63
Nodule as it appears during
quiet phonation.
Slide 64
Nodule removed by surgery,
2 weeks post-surgery.
Slide 65
Nodule removed, 3 weeks
post surgery.
Slide 66
Spectrograms before and
after surgery for vocal nodule
Bottom — before surgery
Middle — 2 weeks after surgery
Top — 3 weeks post surgery