Fantastic summary for a quick review! a question: Are sternocleidomastoid & trapezius muscles innervated by “branchiomotor” efferent of the accessory nerve? or general motor efferent? Since the muscles aren’t derived from pharyngeal arches. Much appreciated :))))
Hi Leon ... good question. To be honest, i have been attending annual anatomy conferences for the past 20 years i think there has been at least one presentation each year addressing this question. The Traps and SCM are interesting because they seem to have one foot in the cranial nerves world and one foot in the spinal nerves world. I don't know the exact answer on this (though i know i put them as brachiomotor in the tutorial). What i tell my med students is this ... the main thing to know are they are usually tested (Traps shrugs shoulders and SCM turns head against resistance), their innervation (CN XI) the foramina traversed by them (Foramen magnum and jugular foramen). Clinically that has been sufficient for what they do clinically and are tested for on board exams. Does that help?
The Noted Anatomist thank you for the thorough answer! And also it’s very interesting to hear that anatomists discuss this in the conference LOL. I appreciate all of your videos and efforts made in the field of science and education :)))
Rad Tenebris correct ... as well as parts of the medulla. Basically a reflex can be affected if the sensory limb (IX), CNS level of the reflex (medulla in this case) or motor limb (X) is injured.
I watched all of your cranial nerve videos. They are great supplementation for my professors. Thank you, Dr.!
Thanks Danielle ... I am glad they were helpful.
Best introduction to this topic. Was looking exactly for something like this. Thank you so much! Extremely helpful!
Finally I found a short but concise explanation... Thanks Doc
I'm happy to find your videos,
thanks too much
Thank you so much. It is first time that I really understand cranial nerves in this amazing manner.
This was so good!
Could you please do a video about vagus in detail?.
Thank you!!
your videos are realy helpful(first year of medical school is hard)
Thank you very much amazing discus
Fantastic summary for a quick review! a question: Are sternocleidomastoid & trapezius muscles innervated by “branchiomotor” efferent of the accessory nerve? or general motor efferent? Since the muscles aren’t derived from pharyngeal arches. Much appreciated :))))
Is it because you considered the contribution of Vagus nerve to the cranial portion of the accessory nerve?
Hi Leon ... good question. To be honest, i have been attending annual anatomy conferences for the past 20 years i think there has been at least one presentation each year addressing this question. The Traps and SCM are interesting because they seem to have one foot in the cranial nerves world and one foot in the spinal nerves world. I don't know the exact answer on this (though i know i put them as brachiomotor in the tutorial).
What i tell my med students is this ... the main thing to know are they are usually tested (Traps shrugs shoulders and SCM turns head against resistance), their innervation (CN XI) the foramina traversed by them (Foramen magnum and jugular foramen). Clinically that has been sufficient for what they do clinically and are tested for on board exams. Does that help?
The Noted Anatomist thank you for the thorough answer! And also it’s very interesting to hear that anatomists discuss this in the conference LOL. I appreciate all of your videos and efforts made in the field of science and education :)))
hii, thank you so much for making these helpful videos.
Amazing, thank you!
excellent
Sir why doesn't nerve supply to larynx come from pharyngeal plexus? Or does it?
It does ... CN IX & X form the pharyngeal plexus
Thanks a lot sir...
Sal, is that you?
😂😂😂
So the gag reflex is affected if the glossopharyngeal nerve or the vagus nerve is affected?
Rad Tenebris correct ... as well as parts of the medulla. Basically a reflex can be affected if the sensory limb (IX), CNS level of the reflex (medulla in this case) or motor limb (X) is injured.
Great , thanks for the video and the reply ❤