Definition Flashcards
Definition of Bell’s Palsy
idiopathic paralysis of 7th CN
Bell’s Palsy AKA:
Prosoplegia
Peripheral Facial Palsy
Idiopathic Facial Palsy
5 Branches of Facial Nerve
- Temporal
- Zygomatic
- Buccal
- Mandibular
- Cervical
Temporal branch innervates
Frontalis
Action of Frontalis ms
- Wrinkling forehead
- Raise eyebrows
- Moving scalp
Zygomatic nerve innervates
Orbicularis oculi
Orbicularis oculi action
- Closing eyelids
- Aiding tear drainage
Buccal nerve innervates
Buccinator
Buccinator action
- Cheek compression
- Whistling
- Blowing
Mandibular n innervates
Orbicularis oris
Orbicularis oris action
Lip closure
Cervical n innervates
Platysma
Lesion 1
Stylomastoid Foramen
Lesion 1 signs and symptoms
- Unilateral facial weakness
- Eye on affected side remains open c lower eyelid sagging
- Bell’s phenomenon
- (-) Blink or corneal reflex
- (-) Whistle
- (-) Pursed lip
- (-) Wrinkle on forehead
- (-) Oculogyric Auricular reflex
Lesion 2
Chorda Tympani (Facial canal)
Lesion 2 signs and symptoms
Includes symptoms of lesion 1 and;
1. Loss of taste in anterior 2/3 of the tongue
2. Crocodile tears
Lesion 3
Stapedius Muscle
Lesion 3 signs and symptoms
Includes symptoms of 1 & 2;
1. Hyperacusis
2. Increased acuity of hearing
Lesion 4
Geniculate ganglion
Lesion 4 signs and symptoms
Includes symptoms of 1, 2 and 3;
• Pain behind ear
Lesion 5
Internal Acoustic Meatus
Lesion 5 signs and symptoms
Includes symptoms of 1, 2, 3 and 4;
1. Deafness
2. Tinnitus
3. Defective Vestibular response
Lesion 6
Pons
Lesion 6 signs and symptoms
Include all symptoms of Bell’s Palsy
May affect:
1. CN V and VIII
2. CN VI, XI, XII
