Trigeminal Nerve, Arterial and Venous Supply of Head & Neck (Clinical Session)
TRIGEMINAL NERVE (CNV)
Branches and Routes of the Maxillary and Mandibular Divisions
VENOUS DRAINAGE OF HEAD AND NECK
- Supratrochlear and Supraorbital veins form Angular vein.
- Angular vein is an upper tributary of the Facial vein.
- Superficial Temporal vein and Maxillary vein from Paroitd gland unite to form the Retromandibular vein.
- Posterior Auricular vein drains into Retromandibular vein.
- Retromandibular vein divides into two branches; Anterior and Posterior branch.
- Anterior branch of Retromandibular vein joins anterior Facial vein anteriorly.
- Posterior branch of Retromandiular vein joins the External Jugular vein posteriorly.
- Occipital vein drains into Suboccipital Venous Plexus in Suboccipital Triangle.
- There are emissary veins connecting deep veins to superficial veins.
> Intercranial Cavernous Sinus
> Pharyngeal Venous Plexus
Muscles of Facial Expression & Facial Nerve (Clinical Session)
Muscles of Facial Expression
Motor Branch of Facial Nerve
Temporal Branch innervates :
- Frontalis
- Obicularis Oculi
- Corrugator Supercilii
- Anterior & Superior Auricular Muscles
- Obicularis Oris
- Buccal region
Mandibular Branch innervates :
- Muscles of Lower Lip
- Chin
Cervical Branch innervates :
- Platysma
Temporomandibular Joint & Muscles Of Mastication (Clinical Session)
TEMPORALIS MUSCLE
Origin : Entire temporal fossa (along inferiors temporal line)Insertion : Coronoid process (along apex, anterior and posterior border)
Action : Elevate & Retrude mandible
Nerve Supply : Temporal branch of mandibular division of CNV
MASSETER MUSCLE
Origin : Zygomatic Arch (medial &inferior border)
Insertion : Angle of mandible, Inferior & lateral part of ramus
Action : Elevate mandible
Nerve Supply : Masseteric branch of mandibular division of CNV
Nerve Supply : Masseteric branch of mandibular division of CNV
LATERAL PTERYGOID MUSCLE
Origin : Lateral surface of lateral pterygoid plate, Greater wing of sphenoid
Insertion : Neck of condyle (pterygoid fovea), Articular disc & capsule of TMJ
Action : Depress, Protrude & Lateral excursion of mandible
Nerve Supply : Lateral pterygoid branch of mandibular division of CNV
Nerve Supply : Lateral pterygoid branch of mandibular division of CNV
MEDIAL PTERYGOID MUSCLE
Origin : Medial surface of lateral pterygoid plate, Palatine (pyramidal process)
Insertion : Medial surface of ramus, Angle of mandible
Action : Elevate, Protrude & Lateral excursion of mandible
Nerve Supply : Medial pterygoid branch of mandibular division of CNV
Video Clip of Face/Mouth during Movement of the Jaws in All Directions
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Nerve Supply : Medial pterygoid branch of mandibular division of CNV
Video Clip of Face/Mouth during Movement of the Jaws in All Directions
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