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30 paź 2023 · The functions of the pharynx are accomplished by two sets of muscles which help push the food bolus further down the digestive tract. In addition, they also help with swallowing and speaking. In this page, we will learn more about the anatomy of the pharynx and its functions, including its main regions and muscles.
- Two Sets of Muscles
The maxillary nerve (CN V/II) supplies the anterior and...
- Two Sets of Muscles
30 paź 2023 · The maxillary nerve (CN V/II) supplies the anterior and superior nasopharynx, while the tonsillar nerves carry fibers from both the glossopharyngeal nerve (CN IX) and the vagus nerve (CN X). The motor branches come from the pharyngeal plexus and carry fibers from the vagus nerve (CN X).
1 maj 2023 · The pharyngeal muscles have a high nerve-muscle fiber ratio of 1:2 to 1:6 which allows for precisely coordinated pharyngeal functions. The innervation of the cricopharyngeus muscle is from the pharyngeal plexus and the recurrent laryngeal nerve.
25 maj 2024 · The pharyngeal plexus, formed by branches of cranial nerves IX and X, supplies motor and sensory innervation to the pharynx. Cranial nerve X is the principal motor nerve for the pharyngeal muscles, contributing through its pharyngeal branches.
Pharyngeal muscles are richly innervated, with a nerve–muscle fiber innervation ratio of 1:2 to 1:6, as compared to 1:2000 for human gastrocnemius muscle and 1:9 for extraocular eye muscles, which is important for the “fine” control required for its function.
25 paź 2012 · Afferent neural information from the pharynx is primarily transmitted via the pharyngeal and superior laryngeal branches of the vagus nerve. Sensory function is critical, as it provokes reflex airway protection and a cascade of motor responses including propagation of the swallow.
3 lis 2023 · Salpingopharyngeus is a longitudinal muscle that contributes to the muscular wall of the pharynx. Together with the stylopharyngeus and palatopharyngeus, it belongs to the inner longitudinal group of pharyngeal muscles. This muscle aids speech and swallowing by shortening and widening the pharynx.
