"innervation: superior branch of the oculomotor nerve (CN III)"
"origin: annulus of Zinn (tendinous ring)"
"insertion: globe (anterior, superior surface)"
"primary function: one of two ocular elevators"
"secondary function: one of the two ocular internal rotators"
"tertiary function: one of the three ocular adductors"
"Rectus comes from the Latin rectos, meaning straight 1."
Expected headings
"Origin"
"Insertion"
"Action"
"Etymology"
"Within the oculomotor nucleus complex, there is a subnucleus that sends nerve fibres which decussate at the level of the midbrain to innervate the contralateral superior rectus muscle; nerve fibres to the remaining muscles supplied by the oculomotor nucleus are ipsilateral as they do not decussate 5."