Identify the muscles of the oral cavity and tongue.
- Identify the
mylohyoid,
geniohyoid and
genioglossus muscles. (G 7.61A;N 64;Gl 44.23)
Important Relationship
- The mylohyoid muscle is positioned inferior to the geniohyoid muscle.
- The genioglossus muscle is positioned superior to the geniohyoid muscle.
- Identify the styloglossus muscle adjacent to the palatoglossus muscle. (G 8.32C;N 68;Gl 44.19) The styloglossus muscle is located in the space between the palatoglossus and the palatopharyngeus muscles. Attempt to identify the glossopharyngeal nerve slightly inferior-medial to the styloglossus muscle.
- Identify the
hyoglossus muscle (G 8.28B;N 70;Gl 44.21B) and the
lingual and
hypoglossal nerves passing lateral to the hyoglossus muscle.
Important Relationships
- The hyoglossus muscle is positioned superior to the hyoid bone.
- The hypoglossal nerve passes deep (superior-medial) to the mylohyoid muscle and lateral to the hyoglossus muscle.
- Identify the lingual artery passing medial (deep) to the hyoglossus muscle. Identify the
lingual vein. Trace the hypoglossal nerve and lingual vein to the anterior border of the hyoglossus muscle and identify the
lingual artery and
sublingual artery at the anterior border of the hyoglossus muscle.
Important Relationship
- The lingual artery passes medial (deep) to the hyoglossus muscle.
