nerves and pharynx info

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nerves and pharynx info
2011-10-02 18:42:58
nerves pharynx info

nerves and pharynx info
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  1. three branches off of the aorta
    • brachiocephalic trunk
    • left common carotid
    • left subclavian
  2. how many parts to the subclavian?
  3. braches off of 1st part of subclavian
    • vertebral
    • thyrocervical trunk
    • internal thoracic
  4. branches off of the thyrocervical trunk
    • suprascapular (sometimes)
    • inferior thyroid
    • ascending cervical
    • transverse cervical
  5. branches off of the second part of the subclavian
    costocercial trunk
  6. boundary between the first part of subclavian and second part of subclavian
    = anterior scalene m.
  7. seven branches of the external carotid artery
    • facial a.
    • lingual a.
    • posterior auricular a.
    • anterior pharyngeal a.
    • superior thyroid a.
    • occipital a.
    • Terminal braches (maxillary a. & superior temporal a.)
  8. carotid sinus
    located where the carotid splits into internal and external carotid a.

    contains baroreceptors, which detect arterial blood pressure

    on IJV
  9. carotid body
    contains chemoreceptors to detect the oxygen level in blood

    in close relation to the carotid sinus
  10. common carotid artery originates from where
    L: the aorta

    R: the brachiocephalic trunk
  11. braches off of the 3rd part of the subclavian a.
    dorsal scapular a.

    (sometimes) suprascapular a.
  12. what does the internal jugular vein lead into:
    enters the Circle of Willis

    "main blood supply to the head"
  13. Nerves of the Neck
    • spinal accessory nerve
    • hypoglossal nerve
    • vagus nerve
    • cervical plexus
    • brachial plexus
  14. Branches of the Cervical Plexus
    • ansa cervicalis
    • phrenic nerve
    • great auricular nerve
    • lesser occipital nerve
    • transverse cervical nerve
    • supraclavicular nerves
  15. Phrenic Nerve
    lies on top of the anterior scalene m.

    innervates the diaphragm

    (C3, 4, & 5 keep the diaphragm alive)
  16. Ansa Cervicalis
    (C1, 2, 3)

    found on top of the internal jugular vein, or within close proximity
  17. superior root of ansa cervicalis is from where?
    from the hypoglossal nerve (C1)
  18. inferior root of ansa cervicalis is from where?
    C2 & C3
  19. lesser occipital nerve
    (what does it run with?)
    runs with the lesser occipital artery
  20. great auricular nerve
    runs behind the external jugular v. on the sternocleidomastoid m.
  21. transverse cervical n.
    runs across upper part of the neck - middlish (runs horizontally)
  22. Brachial Plexus
    C5 - T1

    Ventral Primary Ramus

    goes to upper extremeties between the anterior and middle scalene m.
  23. Cervical Plexus
    ventral primary ramus of C1 - C4 usually
  24. Vagus Nerve
    found thru the carotid sheath; near the common carotid a. and IJV
  25. spinal accessory nerve
    innervates the trapezius m. and the SCM
  26. viscera of the neck:
    • cervical portion of the esophagus
    • trachea
    • thoracic duct
    • thyroid gland
    • parathyroid gland
    • lymph nodes (100s!)
  27. thyroid gland blood supply:
    superior and inferior thyroid a./ v.

    middle thyroid v.
  28. parts of the thyroid gland
    R and L lobes


    pyramidal lobe (20% of ppl)
  29. what kind of hormones does the thyroid gland secrete?
    metabolic hormones
  30. parathyroid glands regulate what?
    regulate calcium ion in the blood of the body
  31. three regions of the pharynx
    • nasopharynx
    • oropharynx
    • laryngonpharynx
  32. parts of the nasopharynx
    • choanae
    • pharyngeal tonsils
    • torus tubaris
    • pharyngotympanic tube
    • salpingopharyngeal fold/ muscle
  33. parts of the oropharynx
    • palatoglossal fold
    • palatopharyngeal fold
    • palatine tonsils (between folds)
    • tongue
    • soft plate
    • lingual tonsils (tongue tonsils)
  34. parts of the laryngopharynx
    • piriform fossa
    • epiglottis
  35. muscles of the pharynx
    1. circular oriented muscles (pharyngeal constricter muscles: superior, middle, and inferior)

    2. longitudinally oriented muscles (stylopharyngeus, salpingopharyngeus, palatopharyngeus)

    3. muscles that move the soft plate (levator veli palatini, tensor veli palatini)