Presentation on theme: "Scalp & Muscles of face D.Rania Gabr D.Sama. D.Elsherbiny."— Presentation transcript:
1Scalp & Muscles of faceD.Rania GabrD.Sama.D.Elsherbiny
2Objectives Explain the muscles of Scalp with their action. Enlist the muscles of facial expressions and discuss their actions.Discuss temporomandibular joint (TMJ).Enlist and discuss the Muscles of Mastication.Enlist the muscles of Neck and discuss their actions.
3ScalpExtensionPosteriorly: from the superior nuchal lines of the occipital boneAnteriorly: from the supraorbital margin of the frontal boneLaterally: over the temporal fascia, to the zygomatic arches
4Layers:S: Skin: contains hairs.C: Connective tissue: contains nerve and blood supply of scalp.A: Apponeurosis: contains occipito-frontali muscle.L: Loose connective tissue: dangerous layer which contains emissery veins.P: Pericranium: periosteum which is adherent to the bone.
5Frontallis:from skin and superficial fascia of eyebrows to aponeurosis.Raises eyebrowsOccipitalis:from highest nuchal line to aponeurosis.Moves the scalp backward.Nerve supply: facial nerve.
6Are derived from the 2nd pharyngeal arch Are supplied by the facial nerveOrbital MusclesOrbicularis Oculi: 3 parts1. Orbital part: powerful closure of the eye2. Palpebral part: light closure (blinking)3. Lacrimal part: dilate the lacrimal sac to aspirate tears from the eyeFrontalis: elevate the eyebrow (act of surprise or fear)Oral MusclesBuccinatorOrbicularis orisZygomaticus major: elevate the angle of the mouthZygomaticus minor: elevate the upper lip
8Orbicularis Oculi: 3 parts 1.Orbital part: surround the orbital margin from the medial palpebral ligament to the medial palpebral lig powerful closure of the eye2. Palpebral part: present in the eyelid from the medial to the lateral palpebral ligament light closure of the eye (blinking and sleep)3. Lacrimal part: from the lacrimal bone to the lacrimal sac dilates the lacrimal sac to aspirate tears
9Origin: outer aspect of maxilla and mandible. Insertion; upper and lower lips.Nerve supply; facial nerve.Action: Blowing – prevent accumulation of food in vestibule of mouth
10Orbicularis Oris In the lips Surrounds the mouth. Nerve supply: facial nerve.Action: whistling and kissing.
13PlatysmaOrigin: from the deep fascia and skin over pectoralis major and deltoid.Insertion:inferior border of the mandibleskin of the face inferior to the mouthNerve supply: Facial nerveAction: depresses the angle of the mandible