nervous system
• most cultured sensory neurons from 3 month old mice exhibit swollen endoplasmic reticulum compared with wild-type neurons
• sensory neurons from 10 month old mice exhibit endoplasmic reticulum expansion and Golgi cisternae dilation compared with wild-type neurons
• aged mice exhibit reduced sensory axon numbers compared with wild-type mice
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• of peripheral sensory nerves
• however, lower motor neurons are normal
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behavior/neurological