Archive image from page 626 of Cunningham's Text-book of anatomy (1914). Cunningham's Text-book of anatomy cunninghamstextb00cunn Year: 1914 ( THE DEEP CONNEXIONS OF THE CEREBEAL NEEVES. 593 brain-stem. This group comprises the hypoglossal nucleus, the abducens nucleus and, in the mesencephalon, the trochlear nucleus and part of the oculomotor Other motor nuclei of origin are present in the form of isolated clumps or columns of gray matter, which lie at different levels in the medulla oblongata and pons in a more lateral and deeper situation. They are the nucleus ambiguus of the acc
Archive image from page 626 of Cunningham's Text-book of anatomy (1914). Cunningham's Text-book of anatomy cunninghamstextb00cunn Year: 1914 ( THE DEEP CONNEXIONS OF THE CEREBEAL NEEVES. 593 brain-stem. This group comprises the hypoglossal nucleus, the abducens nucleus and, in the mesencephalon, the trochlear nucleus and part of the oculomotor Other motor nuclei of origin are present in the form of isolated clumps or columns of gray matter, which lie at different levels in the medulla oblongata and pons in a more lateral and deeper situation. They are the nucleus ambiguus of the accessory, vagus and glossopharyngeal, the facial nucleus, and the nucleus of the motor root of the trigeminal nerve. From their position in the substantia reticularis of the medulla oblongata and pons they constitute a group to which the name of lateral somatic nuclei is applied. In addition to these two columns of motor nuclei there is a third efferent column of splanchnic nuclei represented by the dorsal nucleus of the vagus and glossopharyngeal nerves, and similar nuclei emitting sympathetic fibres into the ROOF-PLATE Splanchnic Terminal Nucleus. > Gustatory Nucleus. Acoustico-Lateral Terminal Nucleus. Somatic Terminal Nucleus. LAMINA BASALIS Somatic - Efferent Nucleus Floor Plate' --- Ear Vesicle. -Sensory Ganglion. 'Skin. Fig. Sympathetic Ganglion Unstnped Muscle Visceral Mucous Membrane -Diagram representing the Different Kinds of Components found in the Cerebral Nerves and of their Nuclei of Origin or Termination. facial and oculomotor nerves. It is possible some splanchnic efferent fibres may pass into the trigeminal nerve. The different nuclei of origin of the efferent fibres which belong to the various cerebral nerves, both medial and lateral, are connected with the motor area of the cerebral cortex by fibres of the cerebro-spinal tract of the other side, which enter the nuclei and end in association with their cells. Nuclei Terminales.—The general scheme
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