A30 - The ganglion of hayfever Flashcards
what are the symptoms of hayfever?
- sneezing & stuffy, runny nose
- watery eyes
- allergy to pollen
- dilates blood vessels
where is the Pterygopalatine Fossa located in relation to the orbital cone?
inferiorly
where is the Pterygopalatine Fossa located in relation to ptygeoid process of the sphenoid bone?
anteriorly
where is the Pterygopalatine Fossa located in relation to the maxilla?
posteriorly
where is the Pterygopalatine Fossa located in relation to the infratemporal fossa?
medially
where is the Pterygopalatine Fossa located in relation to the postero-superior part of the lateral wall of the nasal cavity?
laterally
how does the Pterygopalatine Fossa communicate with the orbit?
inferior orbital fissure
how does the Pterygopalatine Fossa communicate with the middle cranial fossa?
foramen rotundrum and pterygoid canal
how does the Pterygopalatine Fossa communicate with the infratemporal fossa?
pterygomaxillary fissue
how does the Pterygopalatine Fossa communicate with the nasal cavity?
sphenopalatine foramen
where is the sphenopalatine foramen located?
in the lateral wall of the nasal cavity, between the body of the sphenoid and the perpendicular plate of the palatine bone
what does the how does the pterygopalatine Fossa contain?
- terminal 1/3rd of the maxillary artery
- CN Vb
- Pterygopalatine ganglion
what ganglion is responsible for hafever symptoms ?
pterygopalatine ganglion
what branches of the maxillary artery are lateral to the lateral ptygergoid?
- superficial temporal
- deep auricular
- anterior tympanic
- middle meningeal
- inferior alveolar > mental
what are the branches of the maxillary artery that lies superficial to the lateral pterygoid?
- masseteric
- pterygoid
- deep temporal
- buccal
what are the branches of the maxillary artery that lie medially to the lateral pterygoid?
- sphenopalatine
- greater and lesser palatine
- infraorbital
- posterior, middle and anterior superior alveolar
what artery supplies the maxillary molars?
posterior superior alveolar artery
what does the anterior superior alveolar artery supple?
maxillary anterior teeth
what artery supples the maxillary premolars?
middle superior alveolar
what branch of the thrid part of the maxillary artery supplies the skin of the face?
infraorbital artery
what artery supplies the nasal cavity?
sphenopalatine artery
what arteries supply the palate?
- greater palatine supplies the hard palate
- lesser palatine supplies the soft palate
what does the maxilarry artery become when it passes through the sphenopalatine foamen?
sphenopalatine artery
how does the ophthalmic artery get blood supply to the nasal cavity?
via anterior and posterior ethmoidal arteries
how does the maxillary artery get blood supple to the nasal cavity?
via sphenopalatine and greater palatine arteries
how does the facial artery get blood supple to the nasal cavity?
via lateral nasal branch of facial or septal branch of superior labial artery
what is the nerve supply to the superior nasal cavity?
anterior ethmoidal branch of nasociliary
What nerve travels with the sphenopalatine artery through the sphenopalatine foramen to supple to inferior part of the nasal cavity?
nasopalatine nerve
how do preganlionic sympathetic fibres reach the cervical ganglion?
- travel down the spinal cord
- exit the spinal cord in T1 spinal nerve
- travel superiorly in the sympathetic chain
- Synapse in the superior cervical sympathetic ganglion
how do postganglionic sympathetic fibres reach the nasal cavity
postganglionic fibres within the nerve create a plexus on surface of internal carotid artery then reaches nasal cavity via deep petrosal nerve
describe the parasympathetic secretomotor supply to the nasal cavity
- pre ganglionic parasympathetic fibres split from CNVII forming greater petrosal nerve in middle cranial fossa
- post ganglionic sympathetic fibres leave carotid plexus forming deep petrosal nerve
- the greater petrosal nerve and the deep petrosal nerve come together to form the ;nerve of the pterygoid canal
- the nerve of the pterygoid canal travels to the pterygopalatine ganglion of hayfever where the PREganglionic parasympathetic fibres synapse and the POSTganglionic sympathetic fibres pass through
- both post ganglionic parasympathetic and sympathetic fibres are transferred to the mucosa of the nasal cavity
where do the deep petrosal and greater petrosal nerves meet?
foramen lacerum
what is the communicating nerve between the pterygopalatine ganglion and the lacrimal gland that carries postganglionic fibres?
lacrimal nerve - branch of CN VI
what are the branches of the pterygopalatine ganglion?
- lesser palatine nerve to the soft palate
- greater palatine nerve to hard palate
- nasopalatine nerve to nasal septum
- lateral nasal nerve to muscos membrane of lateral wall of nasal cavity
- zygomatic nerve carrying parasympathetic secretomotor fibres from VII to lacrimal gland
what areas does the maxillary Division of the Trigeminal Nerve (Vb) give general sensations?
- Mid-face skin
- Maxillary teeth & gingivae
- Mucosa of maxillary sinus
- Walls of nasal cavity
- Hard and soft palate
The Maxillary Division of the Trigeminal Nerve (Vb) distributes Sympathetic & Parasympathetic (CN VII) secretomotor fibres from pterygopalatine ganglion to what regions?
- Lacrimal gland
- Mucous glands of nasal cavity
- Minor salivary glands of the palate
what nerve supplies somatic sensory to the lateral nasal wall of the nasal cavity?
lateral nasal branch of greater palatine nerve
what nerve supplies somatic sensory to the septum of the nasal cavity?
nasoplatine nerve
