Practical Neuroanatomy Practical Neuroanatomy Lecture 3 Lecture 3 Christine Hulette MD Christine Hulette MD Cranial Nerves Cranial Nerves Auditory System Auditory System Visual System Visual System Olfactory and Limbic System Olfactory and Limbic System Hypothalamus Hypothalamus Reticular System Reticular System
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Practical Neuroanatomy Lecture 3 Christine Hulette MD Cranial Nerves Auditory System Visual System Olfactory and Limbic System Hypothalamus Reticular System.
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Superior Temporal CortexSuperior Temporal Cortex Brodmann areas 41 and 42Brodmann areas 41 and 42
England and Wakely 1991England and Wakely 1991England and Wakely 1991England and Wakely 1991
England and Wakely 1991England and Wakely 1991England and Wakely 1991England and Wakely 1991
England and Wakely 1991England and Wakely 1991England and Wakely 1991England and Wakely 1991
Gertz 1991Gertz 1991Gertz 1991Gertz 1991
VISUAL SYSTEMVISUAL SYSTEMVISUAL SYSTEMVISUAL SYSTEM
The eyeball focuses light which stimulates the retina.The eyeball focuses light which stimulates the retina. These signals are transmitted via the optic nerve, These signals are transmitted via the optic nerve,
chiasm and tract to the lateral geniculate nucleus in the chiasm and tract to the lateral geniculate nucleus in the thalamus.thalamus.
Nervous impulses then travel via the optic radiations to Nervous impulses then travel via the optic radiations to terminate in the primary visual (calcarine) cortex.terminate in the primary visual (calcarine) cortex.
England and Wakely 1991England and Wakely 1991England and Wakely 1991England and Wakely 1991
Gertz 1991Gertz 1991Gertz 1991Gertz 1991
Gertz 1991Gertz 1991Gertz 1991Gertz 1991
OLFACTORY SYSTEMOLFACTORY SYSTEMOLFACTORY SYSTEMOLFACTORY SYSTEM
Sensory receptors in the nasal mucosa are stimulated by Sensory receptors in the nasal mucosa are stimulated by odors.odors.
These stimuli are detected by the olfactory bulb.These stimuli are detected by the olfactory bulb. Nervous impulses then travel through the olfactory Nervous impulses then travel through the olfactory
tract to terminate in the anterior perforated substance.tract to terminate in the anterior perforated substance. There are intimate connections with the entorhinal There are intimate connections with the entorhinal
cortex, amygdala, hippocampus and other parts of the cortex, amygdala, hippocampus and other parts of the limbic system.limbic system.
Sympathetic and parasympathetic balance.Sympathetic and parasympathetic balance.
RETICULAR SYSTEMRETICULAR SYSTEMRETICULAR SYSTEMRETICULAR SYSTEM
Descending reticular system projects to autonomic Descending reticular system projects to autonomic nervous system, extrapyramidal system output to nervous system, extrapyramidal system output to
voluntary muscles via the pontine tegmentumvoluntary muscles via the pontine tegmentum
Ascending (reticular activating system) provides input Ascending (reticular activating system) provides input from all sensory organs to thalamus and cortexfrom all sensory organs to thalamus and cortex