Inferior longitudinal muscle of tongue: Difference between revisions

Revision as of 02:53, 11 December 2024

The inferior longitudinal muscle of the tongue is one of the intrinsic muscles of the tongue. It plays a crucial role in the movement and function of the tongue, particularly in speech and swallowing.

Anatomy

The inferior longitudinal muscle is located on the underside of the tongue. It runs from the root of the tongue to the apex, lying between the genioglossus and hyoglossus muscles. This muscle is paired, with one on each side of the midline of the tongue.

Function

The primary function of the inferior longitudinal muscle is to shorten the tongue and curl the tip downward. This action is important for articulating certain sounds in speech and for manipulating food during mastication and swallowing.

Innervation

The muscle is innervated by the hypoglossal nerve (cranial nerve XII), which is responsible for motor control of the tongue muscles.

Clinical significance

Dysfunction of the inferior longitudinal muscle can affect speech and swallowing. Damage to the hypoglossal nerve, which innervates this muscle, can lead to tongue weakness or paralysis, impacting the muscle's ability to perform its functions.

Also see

References

Gray's Anatomy (1918) - Public domain text

Template:Muscles of the tongue

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-==Inferior Longitudinal Muscle of Tongue==
+{{Infobox muscle
+| Name         = Inferior longitudinal muscle of tongue
+| Latin        = musculus longitudinalis inferior linguae
+| GraySubject  = 242
+| GrayPage     = 1113
+| Image        = Gray1020.png
+| Caption      = Muscles of the tongue, with the inferior longitudinal muscle highlighted.
+| Origin       = Root of the tongue
+| Insertion    = Apex of the tongue
+| Nerve        = Hypoglossal nerve (CN XII)
+| Action       = Shortens the tongue, curls the tip downward
+}}
-The '''inferior longitudinal muscle of the tongue''' is one of the intrinsic muscles of the tongue. It is responsible for various movements and functions of the tongue, contributing to speech, swallowing, and taste perception. This article will provide a detailed overview of the anatomy, function, and clinical significance of the inferior longitudinal muscle of the tongue.
+The '''inferior longitudinal muscle of the tongue''' is one of the intrinsic muscles of the [[tongue]]. It plays a crucial role in the movement and function of the tongue, particularly in speech and swallowing.
-===Anatomy===
+== Anatomy ==
-The inferior longitudinal muscle of the tongue is a thin, flat muscle located on the inferior surface of the tongue. It arises from the root of the tongue and extends anteriorly towards the tip of the tongue. It runs parallel to the superior longitudinal muscle, which is located on the superior surface of the tongue.
+The inferior longitudinal muscle is located on the underside of the tongue. It runs from the root of the tongue to the apex, lying between the [[genioglossus]] and [[hyoglossus]] muscles. This muscle is paired, with one on each side of the midline of the tongue.
-The muscle fibers of the inferior longitudinal muscle are arranged longitudinally, hence its name. These fibers are intermingled with the fibers of the superior longitudinal muscle, creating a complex network of muscle fibers within the tongue.
+== Function ==
+The primary function of the inferior longitudinal muscle is to shorten the tongue and curl the tip downward. This action is important for articulating certain sounds in speech and for manipulating food during mastication and swallowing.
-===Function===
+== Innervation ==
-The main function of the inferior longitudinal muscle of the tongue is to contribute to the movements and shape changes of the tongue during various activities. Some of its specific functions include:
+The muscle is innervated by the [[hypoglossal nerve]] (cranial nerve XII), which is responsible for motor control of the tongue muscles.
-. '''Retraction''': The muscle aids in retracting the tongue, pulling it backward towards the pharynx. This movement is important during swallowing, as it helps propel food towards the throat.
+== Clinical significance ==
+Dysfunction of the inferior longitudinal muscle can affect speech and swallowing. Damage to the hypoglossal nerve, which innervates this muscle, can lead to tongue weakness or paralysis, impacting the muscle's ability to perform its functions.
-. '''Elevation''': The inferior longitudinal muscle assists in elevating the lateral margins of the tongue, contributing to the formation of the tongue's central groove or furrow.
+== Also see ==
+* [[Tongue]]
+* [[Intrinsic muscles of the tongue]]
+* [[Hypoglossal nerve]]
+* [[Speech articulation]]
-. '''Assisting in speech''': The coordinated action of the intrinsic muscles of the tongue, including the inferior longitudinal muscle, is crucial for articulating various speech sounds. The muscle helps in shaping the tongue for specific speech sounds, such as those involving the tip or lateral margins of the tongue.
+== References ==
+* Gray's Anatomy (1918) - Public domain text
-. '''Taste perception''': The inferior longitudinal muscle, along with other intrinsic muscles of the tongue, plays a role in taste perception. Taste buds are located on the surface of the tongue, and the movements of the muscle help in bringing food particles in contact with the taste buds, facilitating taste perception.
+{{Muscles of the tongue}}
+[[Category:Muscles of the head and neck]]
-===Clinical Significance===
-The inferior longitudinal muscle of the tongue can be affected by certain medical conditions or injuries, leading to functional impairments. Some notable clinical considerations include:
-. '''Hypoglossal nerve damage''': The hypoglossal nerve (cranial nerve XII) innervates the intrinsic muscles of the tongue, including the inferior longitudinal muscle. Damage to this nerve can result in tongue muscle weakness or paralysis, affecting the movements and functions of the tongue.
-. '''Speech disorders''': Dysfunction or weakness of the intrinsic muscles of the tongue, including the inferior longitudinal muscle, can contribute to speech disorders such as dysarthria or articulation disorders. These conditions can affect the clarity and intelligibility of speech.
-. '''Swallowing difficulties''': Impairment of the inferior longitudinal muscle's retraction function can lead to swallowing difficulties, known as dysphagia. This can result in problems with food or liquid passage from the mouth to the throat, potentially causing aspiration or malnutrition.
-===Conclusion===
-The inferior longitudinal muscle of the tongue is an important intrinsic muscle that contributes to the movements and functions of the tongue. Its role in speech, swallowing, and taste perception highlights its significance in daily activities. Understanding the anatomy and function of this muscle can aid in diagnosing and managing various clinical conditions related to the tongue and its functions.<br>{{stub}}
-{{dictionary-stub1}}