Views of the basis of the brain and cranium : accompanied with outlines, and a dissertation on the origin of the nerves, interspersed with surgical observations / by T. J. Pettigrew.

  • Thomas Pettigrew
Date:
1809
Catalogue details

Licence: Public Domain Mark

Credit: Views of the basis of the brain and cranium : accompanied with outlines, and a dissertation on the origin of the nerves, interspersed with surgical observations / by T. J. Pettigrew. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

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    Too exquisite a sensibility of the retina produces an incapability of enduring the irritation occasioned by the rays of light, and is called Photophobia. Paralysis of the. Optic nerve produces blindness, generally attended with a dilated and immoveable pupil, known by the name of Amaurosis, or Gutta Serena. It sometimes occurs that only part of the retina becomes paralytic, it then consequently produces only partial privation of vision, and is denominated Hemiopsia. It not unfrequently happens that the retina becomes partly insensible, and that from this diminution of sensibility. Amblyopia, or partial vision, unattended with any external visible alteration of the eye, is the consequence. NERVI MOTORES OCULORUM. The third Pair, or Nervi Motores Oculorum, arise from the Crura Ce- rebri, near the Pons Varolii9, they approach towards the Eminentice Candicantes where they separate, they then perforate the Dura Mater anterior to the anterior clinoid processes of the Os Sphcenoides, and pass forward through the Foramina Lacera Superiora, or orbital fissures. In the orbit, it gives off filaments to the Ganglia Lenticularis seu Opthalmica, and is distributed to five muscles of the eye: three Recti, viz. Levator, Depressor et Adductor, the Levator Palpebrae Superioris et Obliquus Inferior. 9 At the Basis of the Braia are situated four Crura, two of which arise from the Cerebrum, and two from the Cerebellum, these crura unite, and form a body which has a striated surface, and is termed the Pons Varolii, from which several nerves arise. It is likewise called Nodus Cerebri.
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