What cranial nerves innervate the tongue?
The hypoglossal nerve (CN XII) provides motor innervation to all of the intrinsic and extrinsic muscles of the tongue except for the palatoglossus muscle, which is innervated by the vagus nerve (CN X). It runs superficial to the hyoglossus muscle.
What muscle elevates the tongue?
The styloglossus originates at the styloid process and blends into the fibers of the inferior longitudinal tongue muscles and the hyoglossus, and elevates and retracts the tongue posteriorly and superiorly. The genioglossus, hyoglossus, and styloglossus are all innervated by the hypoglossal nerve (CN XII).
What is a main function of the transverse muscle of the tongue?
Function. The transverse muscle of the tongue muscle moves the tongue. It narrows and elongates it.
What is the inferior longitudinal fasciculus?
The inferior longitudinal fasciculus (ILF) is a white matter tract that connects the occipital and the temporal lobes. ILF abnormalities have been associated with deficits in visual processing and language comprehension in dementia patients, thus suggesting that its integrity is important for semantic processing.
What is the superior longitudinal?
The superior longitudinal fasciculus (SLF) is an extensive white-matter tract that mainly communicates between frontal and parietal lobes, and provides partial communication with the temporal lobe. It interconnects nearly all cortical areas of the lateral cerebral hemisphere.
What four cranial nerves innervate the tongue and what are their functions?
Cranial Nerves
| Number | Name | Function |
|---|---|---|
| X | Vagus Nerve | Sensory, motor and autonomic functions of viscera (glands, digestion, heart rate) |
| XI | Spinal Accessory Nerve | Controls muscles used in head movement. |
| XII | Hypoglossal Nerve | Controls muscles of tongue |
Which type of papillae is found in tongue?
The dorsal surface of the mammalian tongue is covered with four kinds of papillae, fungiform, circumvallate, foliate and filiform papillae. With the exception of the filiform papillae, these types of papillae contain taste buds and are known as the gustatory papillae.
What are the 8 muscles of tongue?
extrinsic muscles of the tongue. genioglossus muscle. hyoglossus muscle. styloglossus muscle. palatoglossus muscle.
What muscles control the tongue?
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.