exam 4: CN IX, X,XI,XII (37) Flashcards
GLOSSOPHARYNGEAL NERVE (IX) is associated with what
tongue
pharynx
what foramen is this
Jugular foramen
what foramen is this
what 3 nerves run through it
Jugular foramen
CN IX, X, XI
what nerve is this
GLOSSOPHARYNGEAL NERVE (IX)
what nerves correspond to 1 and 2
- CN X
- CN XI
what does the Jugular foramen externally opens into a fissure
what is the name of this
Tympano-occipital fissure
said it was exam question
what important structure is the Tympano-occipital fissure close to
Tympanic Bulla
said it was exam question
Infections in the middle ear, which is housed in the tympanic bulla is very close to what fissure
Tympano-occipital fissure
said it was exam question
GLOSSOPHARYNGEAL NERVE (IX) Afferent or Efferent
Both
GLOSSOPHARYNGEAL NERVE (IX) has GSA from what part of the body
Sensory of the root of the tongue, palate, and pharynx.
GLOSSOPHARYNGEAL NERVE (IX) sends special visceral afferent (SVA) stimuli from what part(s) of the body
- Taste from the root of the
tongue (papilla) - Carotid sinus and body
does the GLOSSOPHARYNGEAL NERVE (IX) have efferent fibers
yes, GSE and GVE parasympathetic
what ganglion does the GVE signal of the GLOSSOPHARYNGEAL NERVE (IX) synapse at
Otic ganglion
GLOSSOPHARYNGEAL NERVE (IX) :
what are the two glands that the postganglionic parasympathetic (GVE) stimulus go to
Zygomatic gland & Parotid gland salivary glands
(increase secretion, and production of saliva)
GLOSSOPHARYNGEAL NERVE (IX) :
What muscle/ action is the GSE involved in
palatopharyngeal m.
involved in elevating the pharynx and larynx, contributing to the swallowing process
What does the Pharyngeal branch of the GLOSSOPHARYNGEAL NERVE (IX) send GVA signals from
Soft palate, and pharynx
What does the Lingual branch of the GLOSSOPHARYNGEAL NERVE (IX) send GVA signals from
GVA: Mucosa of the root of the tongue
Internal carotid artery has an expansion (bulb) forms the ________
sinus of the carotid
identify what nerve/branch goes to the root of the tongue
Internal carotid artery goes directly into the __________. This is why it is so important!
THE BRAIN
what are the receptors on the internal carotid artery
Carotid sinus (baroreceptors)
Carotid body (chemoreceptors)
what are the branches of the GLOSSOPHARYNGEAL NERVE (IX)
Carotid sinus branch
Lingual branch
Pharyngeal branch
Carotid body (chemoreceptors) of the Internal carotid sinus is for detection of what gas
CO2
The efferent part of the GLOSSOPHARYNGEAL NERVE (IX) has a pharyngeal branch that goes to what kind of muscle
Palatopharyngeal mm. (skeletal)
Medial to the tympanic bulla is
A bunch of nerves like the CN Glossopharyngeal- Pharyngeal branch
The overall job of the Pharyngeal branch of the Glossopharyngeal n is to control the
Constrictor muscles which control swallowing
pharyngeal plexus which consist of cranial nerves ___ and ____ controls swallowing
CN IX & CN X
Identify 1 and 2
- Tympanic bulla
- Pharynx, reflected
What nerves/structure is being pointed to by the yellow arrow
Nerves IX, X & XI and Internal carotid artery going through Tympano-occipital fissure
Identify 1-3
- Tympano-occipital fissure
- Internal carotid a.
- External carotid a
Identify 1-3
- CN X
- CN XI
- Vagosympathetic trunk
identify 1-3
- Tympanic bulla
- CN IX
- Cranial cervical ganglion
what nerves/arteries/veins run within the Tympanooccipital fissure
-Glossopharyngeal n. (CN IX)
- Vagus n. (CN X)
- Accessory n. (CN XI)
- Internal carotid a.
- Internal jugular v
what nerve is this
Vagus n (CN X)
Is the vagus nerve afferent or efferent
both
Where is the GSA signal from on the vagus nerve
GSA: General Somatic Afferent
- External ear canal
- Rostral Laryngeal mucosa
Where is the GVA signal from on the vagus nerve
from cervical, thoracic and abdominal organs
Where is the SVA signal from on the vagus nerve
Taste from epiglottis
Where does the GSE of the vagus go to as they travel the cranial laryngeal nerve
GSE: General Somatic Efferent
-Pharyngeal m.
-Cricothyroid m.
-Laryngeal m., included the Dorsal cricothyroid m.
-Esophagus
Where does the GVE of the vagus go to
GVE: Parasympathetic–Smooth m. and glands
what nerve is sensory for laryngeal mucosa
Cranial laryngeal n.
what ganglion do the Afferent pathway of vagus nerve travel through
Vagal ganglion
Vagus n. Efferent
where do the Somatic motor signals go to?
- Pharyngeal m
- Laryngeal m.
- Esophagus
Vagus n. Efferent
Where do the parasympathetic signals go
- Smooth m. and glands of digestive
apparatus from esophagus & stomach until left colic flexure - Smooth m. and glands of respiratory apparatus from larynx until lungs
what nerves are involved with the epiglottis
Identify 1 and 2
- Pharyngeal branch of cn IX
- Pharyngeal branch of cn X
identify
pharyngeal plexus
Controls swallowing (cn IX & cn X)
identify 1-4
- Pharyngeal branch of vagus
- cranial laryngeal n.
- R. recurrent laryngeal n.
- L. recurrent laryngeal n.
identify 1 and 2
1.Cranial laryngeal n.
- Caudal laryngeal n.-From recurrent laryngeal n.
identify 1 and 2 of the blue arrows
1.Sensory of laryngeal mucosa
2. Sensory of infraglottic laryngeal mucosa
identify 1 and 2 of the red arrows
1.Motor of cricothyroid m
2. Motor of all the other laryngeal mm.–Including dorsal cricoarytenoid m
Identify the nerve
what is it sensory to?
what is it motor to?
Cranial laryngeal n.
Sensory for laryngeal mucosa
Motor for cricothyroid m
CN X: Vagus Nerve goes the Cervical, Thoracic, and Abdominal_________
Viscera
know this image
:)
Identify 1 and 2
- ACCESSORY NERVE (XI)
- Spinal roots to mm. in the neck
identify what the 2 yellow arrows are pointing to
Cranial roots joint with vagus n.
To form the recurrent laryngeal n.
identify the nerve
CN XI from spinal roots
Accessory n. (XI) is motor to what muscles
Motor for neck muscles(fibers originated from spinal roots of XI)
- Trapezius m.
- Cleidocephalicus m.
- Sternocephalicus
what nerve goes to the:
- Trapezius m.
- Cleidocephalicus m.
- Sternocephalicus
Accessory n. (XI)
HYPOGLOSSAL NERVE (XII) is motor (GSE) to the ______________ of the tongue
to the intrinsic and extrinsic muscles of the tongue
what nerve is being pointed to
HYPOGLOSSAL NERVE (XII)
identify the nerve
Hypoglossal nerve
identify 1 and 2
1.Vagosympathetic trunk
2. Cranial laryngeal n
As soon as you touch the mucosa/epiglottis with a stimulate, there is a __________
IF NOT= dead
reflex
Why is the cranial laryngeal nerve (GSA) so important
it “saves you life” every time you aspirate saliva
The recurrent laryngeal nerve brings _____ from the most caudal portion of the esophagus
GSA
the recurrent laryngeal is a branch of what major nerve
vagus
what is the only intrinsic muscle innervated by the cranial laryngeal nerve
cricothyroid m.
repeated this a lot*
where is the origin of the recurrent laryngeal nerve
accessory n.
what happens if there is damage to the recurrent laryngeal nerve
hemiparalysis of the larynx
what does the right recurrent laryngeal nerve wrap around? Left?
Left is around the aortic arch
Right is around the right subclavian
WHAT IS THE MOST IMPORTANT CONCEPT REGARDING THE CRANIAL LARYNGEAL N.
sensory for the larynx– coughing reflex!!!
MAIN ACTION OF RECURRENT LARYNGEAL NERVE
motor for the laryngeal m. including Dorsal cricothyroid m.
IF INJURED= PARALYSIS