Levator labii superioris muscle :- Muscle details :- The levator labii superioris (or quadratus labii superioris) is a muscle of the human body used in facial expression. It is a broad sheet. Origin :- The levator labii superioris (or quadratus labii superioris) is a muscle of the human body used… Continue reading
Levator labii superioris alaequae nasi :- Muscle details :- The levator labii superioris alaeque nasi muscle is, translated from Latin, the “lifter of both the upper lip and of the wing of the nose”. It has the longest name of any muscle in an animal. Origin :- Upper frontal process… Continue reading
orbicul oris muscle :- Muscle details :- Orbicularis oris. Located in the face, the orbicularis oris muscle controls movements of the mouth and lips. Origin :- superior incisivus , from maxilla , inferior incisivus , from mandible .thickest middle stratum , derived from buccinator ,thick superficial stratum ,derived from elevators… Continue reading
Depressor septi :- Muscle details :- The depressor septi (Depressor alœ nasi) arises from the incisive fossa of the maxilla. Its fibers ascend to be inserted into the nasal septum and back part of the alar part of nasalis muscle. It lies between the mucous membrane and muscular structure of… Continue reading
dilator naris :- Muscle details :- The Dilator naris muscle is a part of the nasalis muscle. It is divided into posterior and anterior parts. It arises from the margin of the nasal notch of the maxilla, and from the lesser alar cartilages, and is inserted into the skin near… Continue reading
procerus :- Muscle detail :- Procerus. The procerus muscle is the pyramid-shaped muscle extending from the lower part of the nasal bone to the middle area in the forehead between the eyebrows, where it is attached to the frontalis muscle. Its location allows it to pull the skin between the… Continue reading
compressor naris :- Muscle detalis :- The transverse part (compressor naris) arises from the maxilla, above and lateral to the incisive fossa; its fibers proceed upward and medially, expanding into a thin aponeurosis which is continuous on the bridge of the nose with that of the muscle of the opposite… Continue reading
Orbicularis oculi :- Muscle details :- The orbicularis oculi muscle lies directly underneath the surface the skin, around the eyes. Its function is to close the eyelid, and to help in the passing and draining of tears through the punctum, canaliculi, and lacrimal sac, all parts of the tear… Continue reading
Corrugator Superchilli :-
Corrugator supercilii muscle . The corrugator supercilii is a small, narrow, pyramidal muscle close to the eye. It is located at the medial end of the eyebrow, beneath the frontalis and just above orbicularis oculi muscle. The name corrugator supercilii is Latin, meaning wrinkler of the eyebrows.
The depressor supercilii originates on the medial orbital rim, near the lacrimal bone . It arises from the medial end of the superciliary arch; and its fibers pass upward and laterally, between the palpebral and orbital portions of the orbicularis oculi muscle, and are inserted into the deep surface of the skin, above the middle of the orbital arch.
inserts on the medial aspect of the bony orbit, inferior to the corrugator supercilii. In some specimens it exhibits two heads and in others, only one.
Nerve supply :-
A plexus mainly from the inferior ramus partly from the middle ramus of the temporal branch of the facial nerve enters the corrugator supercilii muscle in the supraorbital area.
Muscle action :-
Corrugator Superchilli action
The corrugator draws the eyebrow downward and medially, producing the vertical wrinkles of the forehead. It is the “frowning” muscle, and may be regarded as the principal muscle in the expression of suffering.The corrugator draws the eyebrow downward and medially, producing the vertical wrinkles of the forehead. It is the “frowning” muscle, and may be regarded as the principal muscle in the expression of suffering. It also contracts to prevent high sun glare, pulling the eyebrows toward the bridge of the nose, making a roof over the area above the middle corner of the eye and typical forehead furrows.
The muscle is sometimes surgically severed or paralysed with botulinum toxin as a preventive treatment for some types of migraine or for aesthetic reasons.
Related pathology :-
In Bell’s palsy corrugator superchillis muscle common paralysis .
The frontalis muscle is innervated by the cranial nerve VII( facial nerve) . Since the frontalis muscle attaches to the skin around the eyebrows, this muscle’s main function is to raise the eyebrows which also causes the skin of the forehead to wrinkle. The frontalis muscle (Latin meaning ‘frontal belly’)… Continue reading