Meyer loop

Last revised by Rohit Sharma on 25 May 2022

The Meyer loop (also sometimes known as Archambault loop) is part of the inferior optic radiation that sweeps back on itself into the temporal lobe, just lateral to the temporal horn of the lateral ventricle. It can be injured in temporal lobectomy, resulting in a superolateral field cut, the so-called pie-in-the-sky field cut.

History and etymology

The anatomy of the optic radiation had been described with various levels of details in the latter half of the 19th century by Louis Pierre Gratiolet and Francois Leuret (1854), Paul Emil Flechsig (1896), and LaSalle Archambault (1906) 3

In 1907 4, Adolf Meyer (1866-1950), a Swiss-born American neuropsychiatrist and neuroanatomist, built upon this earlier work and unequivocally demonstrated the loop of the optic radiation that passes into the temporal pole 3,5.

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Cases and figures

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  • Figure 2
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