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A superior laryngeal nerve palsy changes the pitch of the voice and causes an inability to make explosive sounds due to paralysis of the cricothyroid muscle. If no recovery is evident three months after the palsy initially presents, the damage is most likely to be permanent.
The recurrent laryngeal nerve (RLN) is a branch of the vagus nerve (cranial nerve X) that supplies all the intrinsic muscles of the larynx, with the exception of the cricothyroid muscles. There are two recurrent laryngeal nerves, right and left.
Recurrent laryngeal nerve damage is the most common cause of vocal fold paresis. [4] The RLN is responsible for motor input to the vocal folds. [4] Physicians may also use the term recurrent laryngeal nerve paralysis. [19] Additionally, superior laryngeal nerve damage (SLN) can also lead to vocal fold paresis. [4]
Nerve: External branch of superior laryngeal nerve (branch of the vagus nerve) Actions: Tension and elongation of the vocal folds: Identifiers; Latin: musculus cricothyroideus: TA98: A06.2.08.001: TA2: 2193: FMA: 46417: Anatomical terms of muscle
The inferior pharyngeal constrictor muscle can be supplied by branches from the pharyngeal plexus, [4] the recurrent laryngeal nerve, the external branch of the superior laryngeal nerve, or a combination of these (the recurrent laryngeal nerve being the most common innervation of the cricopharyngeal part). [5]
The external branch of the superior laryngeal nerve innervates the cricothyroid muscle. Motor innervation to all other muscles of the larynx and sensory innervation to the subglottis is by the recurrent laryngeal nerve. While the sensory input described above is (general) visceral sensation (diffuse, poorly localized), the vocal cords also ...
Its lateral thinner portions are pierced by the superior laryngeal vessels and the internal branch of the superior laryngeal nerve. [1] Its anterior surface is in relation with the thyrohyoid muscle, sternohyoid muscle, and omohyoid muscles, and with the body of the hyoid bone. It is pierced by the superior laryngeal nerve. [2]
Superficial branch of the radial nerve; Superficial fibular nerve; Superior cardiac nerve; Superior cervical ganglion; Superior ganglion of glossopharyngeal nerve; Superior ganglion of vagus nerve; Superior gluteal nerve; Superior hypogastric plexus; Superior labial nerve; Superior laryngeal nerve; Superior lateral cutaneous nerve of arm ...