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Facial Ultrasound 101

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10.02: Lateral jaw/face standardized zones

Facial Ultrasound 101 10.02: Lateral jaw/face standardized zones
YOUR ASSIGNMENT FOR THIS LESSON

✅ Step #1: Watch the video presention below. 

✅ Step #2: Click the “Mark Complete” button

The standardized lateral jaw/face zones:

The M Zones and Relevant Landmarks

Key structures that may be visible in the lateral jaw/face zones:

ZONEPOSSIBLE KEY ANATOMY*
M1
Scan over entire masseter muscle		 Masseter m.
Buccal fat pad
Parotid gland
M2
Antegonial notch		 Facial a.
Facial v.
Masseter m.
M3
The intersection of the vertical line from the lateral canthus to the horizontal line from the lateral commissure		 Orbicularis oris m.
Modiolus
Buccinator m.
Facial a.
Facial v.
Buccal fat pad
M4
The intersection of the vertical line from the lateral canthus to the horizontal line from labial mental crease		 Orbicularis oris m.
DAO m.
DLI m.
Platysma m.
Facial a.
Facial v.
M5
Inferior-posterior mental tubercle		 Orbicularis oris m.
DAO m.
DLI m.
Platysma m.

*The structures that can be identified in each zone are subject to variation based on probe footprint, resolution and individual anatomical variability.

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