What is the sensory innervation of the pharyngeal mucosa?
The pharyngeal mucosa, between the level of the auditory tubal orifice and the level rostral to the epi- glottis, is innervated by the sensory fibers of glosso- pharyngeus, whereas the sensory fibers of vagus supply the pharyngolaryngeal mucosa from the level of the epi- glottis.
What does the RLN innervate?
The RLNs provide ipsilateral motor innervation to the intrinsic laryngeal muscles for vocalization—to all the intrinsic laryngeal muscles except for the cricothyroids.
What is the Stylopharyngeus?
The stylopharyngeus muscle is a long, slender and tapered longitudinal pharyngeal muscle that runs between the styloid process of the temporal bone and the pharynx and functions during the pharyngeal phase of swallowing.
What does Glossopharyngeal supply?
The glossopharyngeal nerve carries sensory, efferent motor, and parasympathetic fibers. Its branches consist of tympanic, tonsillar, stylopharyngeal, carotid sinus nerve, branches to the tongue, lingual branches, and a communicating branch to cranial nerve X (vagus nerve).
What cranial nerve Innervates the Cricopharyngeus?
Cricopharyngeus The CP receives innervation from the pharyngeal plexus, which is supplied by three major nerves: vagus nerve branches including the pharyngeal branch of the vagus nerve [also referred to as the pharyngoesophageal nerve (PEN), superior laryngeal nerve (SLN), and recurrent laryngeal nerve (RLN)]; the …
What does sensory innervation mean?
1. ( Physiology) of or relating to the senses or the power of sensation. 2. ( Physiology) of or relating to those processes and structures within an organism that receive stimuli from the environment and convey them to the brain.
What Innervates the cricothyroid?
The classical understanding of the anatomy is that the cricothyroid muscle (CTM) is innervated solely by the external branch of the superior laryngeal nerve (EBSLN), and the endolaryngeal muscles are covered only by the recurrent laryngeal nerve (RLN).
What does hypoglossal nerve supply?
The hypoglossal nerve enables tongue movement. It controls the hyoglossus, intrinsic, genioglossus and styloglossus muscles. These muscles help you speak, swallow and move substances around in your mouth.
Which cranial nerve innervates the sternocleidomastoid and trapezius?
the XI nerve
The muscles innervated directly by the XI nerve are the trapezius and the sternocleidomastoid, in addition to the laryngeal musculature (in collaboration with the vagus nerve), such as the palatal, pharyngeal, laryngeal muscles.
What does Auriculotemporal nerve innervate?
The superior root of the auriculotemporal nerve contains general somatic afferent fibers that provide sensation to the tragus and helix of the ear, the external portion of the tympanic membrane, the posterior temporomandibular joint, and the temple.
What is the anatomy of the hypopharynx?
The pharynx is essentially a muscular tube suspended from the skull base, and it is useful to recall the general anatomy of the upper pharynx when thinking about its lowermost segment, the hypopharynx. The three components of the hypopharynx are the posterior pharyngeal wall, the pyriform sinuses, and the postcricoid region (Fig. 215.1).
How is the sensory innervation of the pharynx organized?
It was found that the sensory innervation of the human pharynx is organized into discrete primary branches that innervate specific areas, although these areas are often connected by small neural anastomoses.
What is the difference between the hypopharynx and cervical esophagus?
The hypopharyngeal walls are continuous with the cervical esophagus below (Figs. 215.1 and 215.2). The transition to the cervical esophagus is below the arytenoids and about 3 to 4 cm in length (Figs. 215.2A,E–F; 215.3; and 215.4). This is the postcricoid portion of the hypopharynx.
What is the most inferior part of the pharynx?
The hypopharynx or laryngopharynx forms the most inferior portion of the pharynx, being the continuation of the oropharynx superiorly and both the larynx and esophagus inferiorly. It also forms part of the upper respiratory tract.