Muscles and bones Flashcards
Where is the orbicularis occuli?
Circular around each eye for squinting
Where is the orbicularis orris?
Circular around the lips- for pouting
Where is the Buccinator?
In the cheek from the lip corner to external oblique ridge- keeps food between teeth when chewing
Where is the zygomaticus and Risoris?
Both together from the lip corner to zygomatic arch- for smiling or elevating lips
Where is the depressor angularis?
From lip corner downwards- to depress lips
Where does the temporalis originate from?
Temporal bone
Where does the temporalis attach to?
The Coronoid
What movement of the jaw does the temporalis do?
Closes (elevates)
Where does the masseter originate from?
The zygomatic arch
Where does the masseter attach to?
Outer angle
What jaw movement does the masseter do?
Closes
Where does the medial pterygoid originate from?
The medial pterygoid plate
Where does the medial pterygoid attach to?
Inner angle
What jaw movement does the medial pterygoid do?
Closes and swings
Where does the lateral pterygoid originate from?
Lateral pterygoid plate
What does the lateral pterygoid attach to?
Inner condyle
What jaw movement does the lateral pterygoid do?
Forwards and swings
Where does the mylohoid originate from?
Mylohyoid ridge
Where does the mylohyoid attach to?
Hyoid bone
What jaw movement does the mylohyoid do?
Opens
Where does the digastric originate from?
The digastric depression
Where does the digastric attach to?
The hyoid bone
What jaw movement does the digastric do?
Opens
What are the four muscles of mastication?
Masseter
Temporalis
Medial pterygoid
Lateral pterygoid
