The transverse part of nasalis is the compressor component that narrows the nasal bridge. Combined with the alar part (dilator), it forms the full nasalis muscle covering the nasal dorsum and sides.
| Origin | Maxilla — above the upper lateral incisor |
|---|---|
| Insertion | Aponeurosis of the nasal dorsum |
| Nerve Supply | Facial nerve — buccal branch (VII) |
| Blood Supply | Lateral nasal artery |
| Actions | Compresses the cartilaginous nose transversely; Narrows the nasal bridge |
|---|
The transverse part is involved in the "bunny line" expression lines on the nasal dorsum. In cleft nose repair, the abnormal attachments of nasalis (both parts) are released and repositioned to reconstruct normal nasal shape.
Seen as the muscle producing transverse nasal creases during facial animation.
Abnormal nasalis transverse part attachment in cleft lip nasal deformity requiring repositioning during primary or secondary rhinoplasty to restore normal nasal shape.
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