By Stanley Monkhouse
This clincally orientated survey of cranial nerve anatomy and serve as provides the most anatomical positive aspects of every nerve, by means of medical facets and info of scientific checking out. easy line diagrams accompany the text.
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Extra resources for Cranial nerves : functional anatomy
The cell body is situated in a peripheral ganglion (dorsal root ganglion for spinal nerves) and the neuron is usually pseudounipolar, that is to say, it gives rise to a single axon which bifurcates into a peripheral process passing to the receptor, and a central process passing into the CNS. The cell body is thus both structurally and electrically out on a limb. The central process of the primary sensory neuron terminates by synapsing 32 Organization of the cranial nerves in a central nucleus which consists of cell bodies of the neuron next in the pathway … Secondary sensory neurons: sensory nucleus to thalamus The axons of these neurons ascend from the nucleus, which contains their cell bodies, to the contralateral thalamus (in the diencephalon), decussating soon after leaving the nucleus.
Branches of the trigeminal (V) nerve are involved peripherally in the complex course of visceral sensory fibres, and visceral sensory fibres are often found in nerves which carry parasympathetic fibres in the opposite direction; they are described later in Chapter 17. Sensory ganglia for visceral sensory fibres Visceral sensory fibres entering the brain stem in the facial nerve (VII) have cell bodies in the geniculate ganglion; those in the glossopharyngeal nerve (IX) have cell bodies in the petrosal (inferior) glossopharyngeal ganglion; and those in the vagus nerve (X) have cell bodies in the nodose (inferior) vagal ganglion.
They innervate the ciliary and iris 20 Organization of the cranial nerves muscles of the eyeball, and the salivary, lacrimal, nasal and palatal glands. They are arranged with two peripheral neurons: pre- and postganglionic. Cell bodies of preganglionic neurons are in brain stem parasympathetic nuclei, and their axons synapse on postganglionic neurons in peripheral parasympathetic ganglia. See Chapter 17. 2; Fig. 1) Axons of cranial nerve motor neurons originate from brain stem nuclei of three types corresponding to the embryological origin of the muscle groups: 1 Somatic nuclei: These are close to the midline, equivalent to spinal cord ventral horn cells.
Cranial nerves : functional anatomy by Stanley Monkhouse
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