Eyes Flashcards
Abducted and Depressed
Medial Rectus
Superior Rectus
Inferior rectus
Inferior Oblique
Action of Medical Rectus
Adduction
CN III
Extorted
Superior Oblique
CN IV
Adducted
Lateral Rectus
CN VI
Action of Superior Rectus
Upward and Medially
CN III
Action of Inferior Rectus
Downward and Medially
CN III
Action of Inferior Oblique
Upward and Laterally
CN III
Action of Superior Oblique
Downward and Laterally
CN IV
Action of Lateral Rectus
Abduction
CN VI
Loss of CN 3 will lead to
Abduction and Depression of Eyes
Loss of Levator Palpebrae Superioris will lead to
Ptosis
Mydriasis is caused by loss of
Sphincter papillae and ciliary muscle
Location of CN 3 nucleus and nerve
ventral part of the periaqueductal gray of the midbrain at the level of SUPERIOR COLLICULUS
What CN is damaged in Internal Strabismus?
Abducens
Location of CN 4 nucleus and nerve
ventral part of the periaqueductal gray of the midbrain at the level of INFERIOR COLLICULUS
Location of CN 6 nucleus and nerve
beneath FACIAL coliculus in the floor of the 4th ventricle in the caudal pons
What causes esotropia?
Medial Deviation and paralysis of CN 6
Lesion at Right optic nerve
Blindness of Right eye
Lesion at Optic Chiasm
Bitemporal Hemianopsia
Lesion at Right angle of chiasm
Right Nasal Heimanopsia
Lesion at Right optic tract
Left Homonymous Hemianopsia
Development of Anterior Pituitary Gland
Hypophysial Pouch/ Rathke
Upgrowth from ROOF of primitive mouth
Development of Posterio Pituitary Gland
Neurohypophysial bud
Downgrowth from the fore brain
