Qtr 3 Head Anatomy Midterm

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Qtr 3 Head Anatomy Midterm
2013-05-01 17:44:57

foramen, auditory, vision, face muscles
Show Answers:

  1. What nerve runs through the stylomastoid foramen?
    Facial nerve (VII)
  2. What are the contents of the jugular foramen?
    • IJV
    • glossopharyngeal n.
    • Vagus n.
    • Accessory n.
  3. Where does the internal carotid artery enter the cranium?
    carotid canal
  4. what nerves enter the internal acoustic meatus?
    • facial 
    • vestibulocochlear
  5. Where do the three branches of the trigeminal nerve exit the cranium?
    • Ophthalmic = superior orbital fissure
    • Maxillary = foramen rotundum
    • Mandibular = foramen ovale

    : Standing Room Only
  6. Where does the optic nerve exit the cranium?
    Optic canal
  7. What makes up the floor of the orbits?
    • orbital part of maxilla
    • zygomatic bone, palatine bone
  8. What makes up the roof of the orbit?
    • Frontal bone
    • Small wing sphenoid
  9. What makes up the medial orbits?
    • maxilla
    • lacrimal bone
    • ethmoid
    • body of sphenoid
  10. What makes up the lateral wall of the orbit?
    • zygomatic bone
    • great wing of sphenoid
  11. What are the three parts of the orbicularis oculi muscle and what innervates it?
    • Orbital part (forcibly closes eyelid)
    • Palpebral part (blinking)
    • Lacrimal part (dilates lacrimal sac)
    • All innervated by facial nerve VII
  12. What are the two parts of the lacrimal gland and what is the innervation?
    • Orbital part
    • Palpebral part
    • Secretomotor = Facial nerve
    • Sensory = Trigeminal nerve
  13. What is the origin of all rectus muscles of the eye?
    Common tendinous ring
  14. Which extraocular muscle does not insert into the sclera?
    • Levator palpebrae superioris 
    • Insertion: Superor tarus and upper lid
  15. What makes up the uveal tract?
    • Choroid
    • Ciliary body
    • Iris
  16. What are the main functions of the structures of the ear?
    • Protect
    • Conduct
    • Transduce
    • Amplify
  17. What are the functions of the external auditory meatus?
    • Protection 
    • Conduction
  18. Which has more sodium or potassium the perilymph or endolymph?
    • perilymph = sodium
    • Endolymph = Potassium

    P's dont go together
  19. What part of the cochlea carries high and low frequencies respectively?
    • High = Base
    • Low = Apex
  20. What does the utricle detect?
    linear acceleration and gravity in horizontal plane
  21. What does the saccule detect?
    linear acceleration and gravity in vertical plane
  22. What contains the cupula of the semicircular canals?
    Crista ampullaris
  23. What acts like the cupula in the utricle and saccule
  24. What is the etiology of benign paroxysmal positional vertigo BPPV?
    Otoliths become dislodged from vestibule and circulate the semi-circular canals (Posterior is most common)
  25. What may vertical nystagmus indicate?
  26. Supraorbital, supratrochlear, lacrima, infratrochlear, and external nasal are all branches of what cranial nerve?
    Ophthalmic division of trigeminal
  27. Where do all fibers of the facial nerve pass out?
    Internal auditory meatus
  28. What does the motor branch of the facial nerve pass through?
    • Internal acoustic meatus
    • stylomastoid foramen
  29. What are the motor divisions and branches of the facial nerve?
    • Temporofacial division
    •          -Temporal branch
    •          -Zygomatic branch
    • Cervicofacial division
    •          -Buccal branch
    •          -Marginal mandibular branch
    •          -Cervical branch
  30. What are the layers of the SCALP?
    • Skin (hair follicles, sebaceous and sweat glands)
    • Connective tissue (blood vessels and nerves)
    • Aponeurotic (unites frontalis and occiptalis muscles)
    • Loose connective tissue (subaponeurotic space can spread infection to intracranial sinuses)
    • Pericranium (periosteum of skull)
  31. Frontal belly of occipitofrontalis
    • Protracts scalp / raise eyebrows
    • Temporal branch of Facial nerve
  32. Occipital belly of occipitofrontalis
    • retracts scalp / assists in raising eyebrows
    • posterior auricular nerve of CNVII
  33. Corrugator supercilii
    • draws eyebrows down and medial
    • temporal branch CN VII
  34. Procerus m.
    • wrinkles skin between eyebrows
    • Buccal branch CN VII
  35. Nasalis
    • Transverse part - compresses nostrils
    • Alar part - dilates nostrils
  36. Orbicularis oris
    • closes or purses lips
    • Buccal and marginal mandibular branch of CN VII
  37. What muscles elevate the lip and what is their innervation?
    • Levator Labii superioris (also dilates nares)
    • Levator Labii superioris alaeque nasi (also elevates ala of nose)
    • Zygomaticus minor
    • Zygomaticus major (up and back)
    • All innervated by buccal branch CN VII
  38. Risorius m (joker muscle)
    • Retracts angle of mouth
    • Buccal branch
  39. Depressor labii inferioris
    • depresses lower lip
    • marginal mandibular branch
  40. Depressor anguli oris
    • depresses angle of mouth
    • marginal mandibular branch
  41. Mentalis m.
    • Elevates and protrudes lower lip
    • marginal mandibular b.
  42. Buccinator m.
    • compresses cheek
    • Buccal branch
  43. Platysma m.
    • depresses mandible and angle of mouth
    • Cervical branch of Facial nerve