NBME 27 WITH CORRECT SOLUTIONS.
,
, defect in development of the first pharyngeal arch leads to? - correct ans:-
hypoplasia of mandible and micrognathia leading to posterior displacement
of the tongue --> airway obstruction, hypoxia, feeding difficulty, and
respiratory distress
**Pierre Robin Syndrome
2nd pharyngeal arch leads to development of? - correct ans:middle ear,
hyoid bone, temporal styloid process, and muscles including facial muscles,
stapedius, platysma, and stylohyoid; CN VII
3rd pharyngeal arch leads to development of? - correct ans:stylopharyngeus
muscle and glossopharyngeal nerve (CN IX)
4th pharyngeal arch leads to development of? - correct ans:cricothyroid
muscle and muscles of soft palate as well as thyroid cartilage; innervated by
superior laryngeal branch of vagus nerve
6th pharyngeal arch leads to development of? - correct ans:all intrinsic
muscles of the larynx except the cricothyroid muscle, the cricoid, arytenoid,
corniculate and cuneiform cartilages; innervated by laryngeal branch of
vagus nerve
hair pulling disorder? - correct ans:trichotillomania
**broken hairs are different lengths
alopecia areata - correct ans:chronic, immune mediated disorder of hair loss
can present with diffuse or focal hair loss
areas may demonstrate smooth or irregular borders
hairs are typically narrower proximally than distally and are prone to
breaking
**broken hairs are usually the same length
,
, defect in development of the first pharyngeal arch leads to? - correct ans:-
hypoplasia of mandible and micrognathia leading to posterior displacement
of the tongue --> airway obstruction, hypoxia, feeding difficulty, and
respiratory distress
**Pierre Robin Syndrome
2nd pharyngeal arch leads to development of? - correct ans:middle ear,
hyoid bone, temporal styloid process, and muscles including facial muscles,
stapedius, platysma, and stylohyoid; CN VII
3rd pharyngeal arch leads to development of? - correct ans:stylopharyngeus
muscle and glossopharyngeal nerve (CN IX)
4th pharyngeal arch leads to development of? - correct ans:cricothyroid
muscle and muscles of soft palate as well as thyroid cartilage; innervated by
superior laryngeal branch of vagus nerve
6th pharyngeal arch leads to development of? - correct ans:all intrinsic
muscles of the larynx except the cricothyroid muscle, the cricoid, arytenoid,
corniculate and cuneiform cartilages; innervated by laryngeal branch of
vagus nerve
hair pulling disorder? - correct ans:trichotillomania
**broken hairs are different lengths
alopecia areata - correct ans:chronic, immune mediated disorder of hair loss
can present with diffuse or focal hair loss
areas may demonstrate smooth or irregular borders
hairs are typically narrower proximally than distally and are prone to
breaking
**broken hairs are usually the same length
