Prab at 15:09, 4 February 2025

2025-02-04T15:09:04Z

← Older revision		Revision as of 15:09, 4 February 2025
Line 7:		Line 7:

	The muscles of the nose (Fig. 378). comprise:		The muscles of the nose (Fig. 378). comprise:
			* Procerus.
	Procerus.		* Depressor septi.
			* Nasalis.
	Depressor septi.		* Dilatator naris posterior.
			* Dilatator naris anterior.
	Nasalis.

	Dilatator naris posterior.

	Dilatator naris anterior.

	=== '''Procerus''' ===		=== '''Procerus''' ===
Line 65:		Line 60:
	{{muscle-stub}}		{{muscle-stub}}
	{{grays}}		{{grays}}
	~~__NOINDEX__~~

Prab: CSV import

2025-02-04T06:56:16Z

CSV import

← Older revision		Revision as of 06:56, 4 February 2025
Line 65:		Line 65:
	{{muscle-stub}}		{{muscle-stub}}
	{{grays}}		{{grays}}
			__NOINDEX__

Prab at 21:23, 31 August 2023

2023-08-31T21:23:46Z

New page

[[Anatomy]] > [[Gray's Anatomy| Gray's Anatomy of the Human Body]] > IV. Myology > 4c. The Muscles of the Nose

[[Henry Gray]] (1821–1865). Anatomy of the Human Body. 1918.

=='''The Muscles of the Nose'''==

The muscles of the nose (Fig. 378). comprise:

Procerus.

Depressor septi.

Nasalis.

Dilatator naris posterior.

Dilatator naris anterior.

=== '''Procerus''' ===
The '''Procerus''' (''Pyramidalis nasi'') is a small pyramidal slip ''arising'' by [[tendinous]] fibers from the [[fascia]] covering the lower part of the nasal bone and upper part of the lateral nasal [[cartilage]]; it is ''[inserted'' into the skin over the lower part of the forehead between the two eyebrows, its fibers [[decussating]] with those of the [[Frontalis]].

=== '''Nasalis''' ===
The '''Nasalis''' (''Compressor naris'') consists of two parts, [[transverse]] and [[alar]].

The '''transverse part''' ''arises'' from the [[maxilla]], above and lateral to the [[incisive]] [[fossa]]; its fibers proceed upward and medialward, expanding into a thin [[aponeurosis]] which is continuous on the bridge of the nose with that of the muscle of the opposite side, and with the aponeurosis of the Procerus.

=== '''Alar part''' ===
The '''alar part''' is attached by one end to the greater alar cartilage, and by the other to the [[integument]] at the point of the nose.

=== '''Depressor septi''' ===
The '''Depressor septi''' (''Depressor alœ nasi'') ''arises'' from the [[incisive fossa]] of the [[maxilla]]; its fibers ascend to be ''inserted'' into the [[septum]] and back part of the ala of the nose. It lies between the [[mucous]] membrane and muscular structure of the lip.

=== '''Dilatator naris posterior''' ===
The '''Dilatator naris posterior''' is placed partly beneath the Quadratus labii superioris. It ''arises'' from the margin of the nasal [[notch]] of the maxilla, and from the lesser [[Alar cartilage|alar]] cartilages, and is ''inserted'' into the skin near the margin of the [[nostril]].

=== '''Dilatator naris anterior''' ===
The '''Dilatator naris anterior''' is a delicate [[fasciculus]], passing from the greater alar cartilage to the integument near the margin of the nostril; it is situated in front of the [[preceding]].

=== '''Variations''' ===
These muscles vary in size and strength or may be absent.

=== '''Nerves''' ===
All the muscles of this group are supplied by the [[facial]] nerve.

=== '''Actions''' ===
The [[Procerus]] draws down the medial angle of the eyebrows and produces transverse [[wrinkles]] over the bridge of the nose. The two [[Dilatatores]] enlarge the [[aperture]] of the nares.

Their action in ordinary breathing is to resist the tendency of the nostrils to close from atmospheric pressure, but in difficult breathing, as well as in some emotions, such as anger, they contract strongly.

The Depressor [[septi]] is a direct antagonist of the other muscles of the nose, drawing the [[ala]] of the nose downward, and thereby constricting the aperture of the [[nares]]. The [[Nasalis]] depresses the cartilaginous part of the nose and draws the ala toward the [[septum]].
==Additional images==
<gallery>
File:Sobo 1909 260.png
File:Sobo 1909 262.png
File:Sobo 1909 264.png
File:Sobo 1909 266.png
File:Nasalis muscle animation small.gif|Position of nasalis muscle (shown in red).
File:Gray157.png|Left maxilla. Outer surface.
</gallery>
==External links==
*[http://www.ivy-rose.co.uk/References/glossary_entry144.htm Interactive diagram at ivy-rose.co.uk]
{{Muscles of head}}
[[Category:Muscles of the head and neck]]
{{muscle-stub}}
{{grays}}

The Muscles of the Nose - Revision history

Prab at 15:09, 4 February 2025

Prab: CSV import

Prab at 21:23, 31 August 2023