Muscles Of Tongue

INTRINSIC MUSCLES:
  1. Superior Longitudinal
  2. Inferior Longitudinal
  3. Transverse
  4. Vertical
EXTERNAL MUSCLES:
  1. Styloglossus
  2. Hyoglossus
  3. Genioglossus( Safety muscle of tongue)
  4. Palatoglossus

MUSCLES ORIGIN INSERTION ACTION(S) INNERVATION
Genioglossus Upper genial tubercle of mandible Upper fibres: tip of the tongue
Middle fibres: dorsum
Lower fibres: hyoid bone
Upper fibres: retract the tip
Middle fibres: depress the tongue
Lower fibres: pull the posterior part forward(thus protrusion of the tongue from the mouth)
Hypoglossal nerve
Hyoglossus Greater cornu, front of lateral part of body of hyoid bone Side of tongue Depress the tongue
Retracting the protruded tongue
Hypoglossal nerve
Styloglossus Tip, anterior surface of styloid process Side of tongue Pulls the tongue upwards and backwards during swallowing Hypoglossal nerve
Palatoglossus Oral surface of palatine aponeurosis Side of tongue (junction of oral and pharygeal part) Pulls up root of tongue, approximates
palatoglossal arches, closes oropharyngeal isthmus
Pharyngeal Plexus
Intrinsic muscles

MUSCLES ORIGIN INSERTION ACTION
Superior Longitudinal Submucous fibrous layer below the dorsum of the tongue and lingual septum Extends to the lingual margin Turns the apex and sides of the tongueupward to make the dorsum concave
Inferior Longitudinal
(Narrow band close to the inferior surface of the tongue)
Root of tongue and body of hyoid bone Apex of tongue Curls the tip inferiorly and shortens the tongue
Transverse Median fibrous septum Fibrous tissue at the margins of tongue Narrows and elongates the tongue
Vertical Dorsum surface of the borders of the tongue Ventral surface of the borders of the tongue Flattens and broadens the tongue
Exam Question
  • Palatoglossus is only muscle of tongue not supplied by hypoglossal nerve
  • Genioglossus is the Safety muscle of tongue
Don't Forget to Solve all the previous Year Question asked on Muscles Of Tongue