HYOGLOSSUS MUSCLE
It is the flat quadrilateral muscle of the tongue.
ORIGIN:-
Greater cornua and body of hyoid bone.
INSERTION:-
Side of tongue between styloglossus and inferior longitudinal muscles of tongue.
RELATIONS:-
Hyoglossus, a quadrilateral sheet of muscle, is the key muscle of the suprahyoid region. Because, it serves as a landmark for the neighbouring structures in the region. Therefore, it's relations are very important to surgeons.
Superficial relations:
1. Hypoglossal nerve
Crosses the lower part of muscle from behind forwards.
2. Lingual nerve
Crosses the upper part of muscle from behind forwards.
3. Deep part of the submandibular gland and submandibular duct
Gland lies in the middle of hyoglossus muscle.
Duct lies between the gland and the muscle.
4. Submandibular ganglion
Lies between lingual nerve and deep part of the submandibular gland.
5. Styloglossus muscle
Interdigitates with hyoglossus.
6. Mylohyoid muscle
Overlaps the hyoglossus anterosuperiorly.
Deep relations:
Inferior longitudinal muscle of tongue
Genioglossus muscle anteriorly
Middle constrictor of pharynx posteriorly
Glossopharyngeal nerve
Stylohyoid ligament
Lingual artery
STRUCTURES PASSING DEEP TO POSTERIOR BORDER:-
Glossopharyngeal nerve
Stylohyoid ligament
Lingual artery
NERVE SUPPLY:-
Hypoglossal nerve - 12th cranial nerve.
ACTIONS:-
Depresses tongue
Retracts protruded tongue
0 Comments