anatomy of head and neck. muscles of mastication is an important topic to learn. muscles of the tongue.

1. Muscles ..
By: Shlok Pushpesh Mathur

2. Muscles of
Mastication..
Masseter
Temporalis
Medial Pterigoid
Lateral Pterigoid
Buccinator

3. Masseter..
 Origin : Zygomatic arch and
zygomatic bone
 Insertion : angle and ramus of
mandible
 Function : closes the jaw
 Nerve supply mandibular
branch of trigeminal nerve

4. Temporalis ..
 Origin :Temporal fossa
 Insertion : Coronoid process
of mandible via a tendon that
passes deep to zygomatic
arch
 Function : closes the jaw
 Nerve supply : Mandibular
branch ofTrigeminal nerve

5. Medial
Pterigoid ..
 Origin : medial surface of
lateral pterigoid plate of
sphenoid bone , maxilla and
palatine bone
 Insertion : medial surface of
mandible near its angle
 Function : protracts the
mandible and produce
grinding movement
 Nerve supply : mandibular
branch of trigeminal nerve

6. Lateral
Pterigoid..
 Origin : greater wing and
lateral plate of sphenoid
 Insertion : condylar process
of mandible and capsule of
temporomandibular joint
 Function : protracts the
mandible and produce
grinding movement
 Nerve supply : mandibular
branch of trigeminal nerve

7. Buccinator..
 Origin : Molar region of
maxilla and mandible
 Insertion : orbicularis oris
 Function : compresses the
cheek (whistling)
 Nerve supply : Facil nerve

8. Muscles of the
Tongue..
EXTRINSIC MUSCLES:
Genioglossus
Hyoglossus
Styloglossus
Palatoglossus

9. Genioglossus ..
 Origin : mental spine of the
mandible
 Insertion : hyoid bone and
the bottom of the tongue
 Function : protrudes the
tongue
 Nerve supply : hypoglossal
nerve

10. Hyoglosus..
 Origin : hyoid bone
 Insertion : inferolateral
tongue
 Function : depresses the
tongue
 Nerve supply : hypoglossal
nerve

11. Styloglossus..
 Origin : styloid process of
temporal bone
 Insertion : lateral inferior
aspect of the tongue
 Function : retracts and
elevates the tongue
 Nerve supply : hypoglossal
nerve

12. Palatoglossus..
 Origin : palatine aponeurosis
 Insetion : tongue
 Function : raising the back
part of the tongue
 Nerve supply : vagus nerve

13. Muscles of the
Tongue..
INTRINSIC MUSCLES :
Superior longitudinal
Inferior longitudinal
Vertical
Transverse

14. Thank you..
Doubt ??