Levator labii superioris :-

Levator labii superioris :-

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 :-

Levator labii superioris alaequae nasi :-

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

Orbicularis oris muscle :-

Orbicularis oris muscle :-

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

Orbicularis oculi muscle details :-

Orbicularis oculi muscle details :-

  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 Muscle Detail :

Corrugator Superchilli :-

corruigator supercilii

Muscle Detail:-

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.

Origin :-

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.

Insertion :-

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.[1]

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 .

Frontalis Muscle Detail :

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