Facial nerve VII th nerve
IT is attached to brain srtem by two roots
sensory and motor…
the motor is also called nervus intermedius…
‘it is attached to lateral to lower border of pons medial to eight nerve…
It passes laterally and reache the external meatus..
‘it is attached to lateral to lower border of pons medial to eight nerve…
It passes laterally and reache the external meatus..
In MEATUS
In meatus the motor root lies in groove on 8th nerve with the sensory nerve intervening….
Here it is being accompanied by labyrinth vessesls
AT BOTTOM OF FUNDUS
At fundus of fundus the two roots join together to forma trunk and the trunk lies in d petrous temporal bone…
WITHIN CANAL
IT COURSE CAN BE DIVIDED INTO THREE PARTS
1 PARTS LIES ANTERIOR TO vestibule
2ND PART LIES medial to the middle ear above the promontory
3rd part is vertical
First bent lies at the junction of 1st nad 2nd part
It lies anterosuperior part of promontory called genu
2nd bent is gradual and lies b/w aditus to mastoid antrum and promontory
FCIAL NERVE LEAVE THE SKULL Y PASSING THROUGH STYLOMASTOID FORAM4N
EXTRACRANIAL COURSE
IN extracranial course it passes lateral to base f styloid process lies posteromedial wall of parotid gland crossing retromandibular vein and external carotid artery reaches behind neck of mandible ( 5 branches)
DIVISION
WITHIN CANAL
1. GREATER PETROSAL
2. CHORDA TYMPHANI
3. NERVE TO STAPEDIUS
NERVE TO STAPEDIUS ARISES OPPOSITE TO PYRAMID OF MIDDLE EAR
The muscle damp excessive vibration
CHORDA TYMPANI it arises 6mm above the stylomastoid foramen…
Enter the medial ear through petro tymphnic fissure reaches infratemporal fossa joins lingual nerve…
Supply
Submandibular gland
Anterior 2/3 of tongue…
temporal
Auricularis anterior
Auricularis superior
Frontalis
Orbicularis occuli
Corrugator supercillia
Zygomatic
Supply
Orbicularis occuli
Buccal two in no…
One above the parotid gland and second below
Marginal mandibular
Below angle of mandible supply muscles of chin and lower lip
Cervical
Platysma
Other branches
Post auricular
Digastric
Stylohyoid
In meatus the motor root lies in groove on 8th nerve with the sensory nerve intervening….
Here it is being accompanied by labyrinth vessesls
AT BOTTOM OF FUNDUS
At fundus of fundus the two roots join together to forma trunk and the trunk lies in d petrous temporal bone…
WITHIN CANAL
IT COURSE CAN BE DIVIDED INTO THREE PARTS
1 PARTS LIES ANTERIOR TO vestibule
2ND PART LIES medial to the middle ear above the promontory
3rd part is vertical
First bent lies at the junction of 1st nad 2nd part
It lies anterosuperior part of promontory called genu
2nd bent is gradual and lies b/w aditus to mastoid antrum and promontory
FCIAL NERVE LEAVE THE SKULL Y PASSING THROUGH STYLOMASTOID FORAM4N
EXTRACRANIAL COURSE
IN extracranial course it passes lateral to base f styloid process lies posteromedial wall of parotid gland crossing retromandibular vein and external carotid artery reaches behind neck of mandible ( 5 branches)
DIVISION
WITHIN CANAL
1. GREATER PETROSAL
2. CHORDA TYMPHANI
3. NERVE TO STAPEDIUS
NERVE TO STAPEDIUS ARISES OPPOSITE TO PYRAMID OF MIDDLE EAR
The muscle damp excessive vibration
CHORDA TYMPANI it arises 6mm above the stylomastoid foramen…
Enter the medial ear through petro tymphnic fissure reaches infratemporal fossa joins lingual nerve…
Supply
Submandibular gland
Anterior 2/3 of tongue…
temporal
Auricularis anterior
Auricularis superior
Frontalis
Orbicularis occuli
Corrugator supercillia
Zygomatic
Supply
Orbicularis occuli
Buccal two in no…
One above the parotid gland and second below
Marginal mandibular
Below angle of mandible supply muscles of chin and lower lip
Cervical
Platysma
Other branches
Post auricular
Digastric
Stylohyoid
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