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| - INFERIOR CONSTRICTOR
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| ORIGIN: |
Cricopharyngeus: lateral aspect of arch of cricoid cartilage. Thyropharyngeus: oblique line of laminar of thyroid cartilage and fibrous cricothyroid arch |
| INSERTION: | Cricopharyngeus: continuous with muscle of opposite side, behind pharynx. Thyropharyngeus : lower pharyngeal raphe
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| ACTION: |
Assists swallowing . Cricopharyngeus acts as upper esophageal sphincter
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| NERVE: |
Pharyngeal plexus (IX, X and sympathetic) via pharyngeal branch of X with its motor fibers from cranial accessory (XI)
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