Not true regarding Optic Nerve: (A) Made of axons of 2nd order neuron in visual pathway, (B) 47-50 mm length, (C) Intracranial pa is the longest, (D) Smallest pa is intraocular
Answer is C. CRANIAL NERVE Optic nerve arises from ganglion cell axons. *Length = 47-50mm. *Can be considered as pa of brain *3rd order neuron *Protected by meninges *Pas: Intraocular, Intraorbital, intracanalicular, intracranial *Smallest pa of optic nerve is intraocular *Longest pa : Intraorbital Order of Neurons *Rods & Cones (Photoreceptors) *Bipolar Cells: 1st order Neuron *Ganglion Cells: 2nd order Neuron *Neurons that take impulse from LGB to Brain: 3rd order neuron