Neck - Mostly

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Biology 323 Human Anatomy for Biology
Majors Lecture 18 Dr. Stuart S. Sumida
From the Head to the Neck (or was it from the
body to the neck?)
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• Carotid Sheath
• Carotid Artery
• Jugular Vein
• Vagus Nerve
• Do you remember what foramina these pass through?!

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Superior Pharyngeal Constrictor (attaches
to Pterygomandibular raphe)
Middle Pharyngeal Constrictor (attaches to Hyoid
bone)
Inferior Pharyngeal Constrictor (attaches
to Thyroid and cricoid cartilages)
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Phonation(Speaking)
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Phonation Articulation

• Glottis closes
• Recurrent laryngeal nerve from CN X
• Air is forced through the glottis
• Vocal folds vibrate and produce a constant tone
  (phonation)
• Pitch of the tone depends on
• Diameter, length, tension of vocal folds (CN X)

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Strap MusclesAid in Phonation
Sternum
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X
Pathways of the Vagus Nerve (CN X)
Sensory
Parasympathetic
Jugular foramen
Branchial Motor
Hyoid bone
Pharyngeal Constrictor Muscles
Laryngeal Muscles
Thyroid cartilage (Laryngeal cartilage)
Cricoid cartilage
Recurrent laryngeal nerve
Esophagus
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Phonation Articulation

• The tone is articulated into voice.
• Tone depends on
• Size and shape of the oropharynx and nasopharynx
• Position of jaw (CN V3), tongue (CN XII), and
  lips (CN VII)

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Test yourself and identify the following
structures
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Anterior
Posterior
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Anterior
Posterior
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Posterior
Anterior