Special Organs in the Head Flashcards
Divides the mucous membrane of the tongue into anterior (oral) and posterior (pharyngeal) parts
Sulcus terminalis (V shaped sulcus)
Apex projects backward and is marked by a small pit
Site of origin of thyroglossal duct
Foramen cecum
Arranged in the form of “V” in front of the sulcus terminalis
10-12 in number
VALLATE papillae
Mushroom shaped projections scattered on the side and apex of the tongue
FUNGIFORM papillae
Slender conical projections arranged in rows parallel to the sulcus terminalis
FILIFORM papillae
RUDIMENTARY in humans
FOLIATE papillae
Intrinsic muscles of the tongue
alter the SHAPE
Superior and Inferior Longitudinal
Transverse
Vertical
Extrinsic muscles of the tongue
alter the POSITION
Palatoglossus - ELEVATION (CN X)
Styloglossus - RETRACTION
Hyoglossus - DEPRESSION
Genioglossus - PROTRUSION, comprises bulk of the tongue
All tongue muscles are innervated by HYPOGLOSSAL NERVE (CN XII) EXCEPT
Palatoglossus -(CN X)
Nerve supply of the GENERAL sensation of the tongue
ant 2/3 - CN V3 (lingual nerve)
post 1/3 - CN IX (glossopharyngeal nerve)
SPECIAL sensation of the tongue
ant 2/3 - CN VII (facial nerve)
post 1/3 - CN IX (glossopharyngeal nerve)
Receive both general and taste innervation from CN IX (glossopharyngeal)
Posterior 1/3 of the tongue and VALLATE papillae
Receive both general and taste innervation from the INTERNAL LARYNGEAL of VAGUS NERVE
Epiglottic region
Blood supply of the tongue
ECA – Lingual artery
Roof of the Orbit
Lesser wing of the sphenoid bone
Orbital plate of the FRONTAL bone
Medial wall of the Orbit
Sphenoid body
Orbital plate of the ETHMOID bone
Lateral wall of the Orbit
Zygomatic process of FRONTAL bone
Greater wing of the sphenoid bone
Orbital surface of the ZYGOMATIC bone
Floor of the Orbit
Orbital plate of the MAXILLA
Palatine
Zygomatic bone
Medial Rectus
ADDUCTION
CN III
patient asked to look to the nose (medially)
injury –> abducted and depressed
Superior Rectus
ELEVATION, intorsion and adduction
CN III
patient asked first to look to the side then look up
injury –> abducted and depressed
Inferior Rectus
DEPRESSION, intorsion and adduction
CN III
patient asked first to look to the side then look down
injury –> abducted and depressed
Inferior Oblique
EXTORSION, ABDUCTION, elevation
CN III
patient asked first to look to the nose then look up
injury –> abducted and depressed
Superior Oblique
INTORSION, ABDUCTION, depression
CN IV
patient asked first to look to the nose then look down
injury –> extorted
Lateral Rectus
ABDUCTION
CN VI
patient asked to look to the side (laterally)
