Practical Neuroanatomy Lecture 4 Christine Hulette MD General Sensation and Review.

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Presentation transcript:

Practical Neuroanatomy Lecture 4 Christine Hulette MD General Sensation and Review

PAIN AND TEMPERATURE Receptors in dermis and epidermis Dorsal root ganglion  dorsal horn of spinal cord Cross to lateral spinothalamic tract and ascend to Ventral Posterior Lateral (VPL) nucleus of the Thalamus Post Central Gyrus Reflex arc present at the spinal cord level

behavioralphys.wikispaces.com

biology.clc.uc.edu/.../ganglionbiology.clc.uc.edu/.../ganglion

PRESSURE AND CRUDE TOUCH Receptors in dermis Dorsal root ganglion  dorsal horn of spinal cord Ventral Spinothalamic Tract Ventral Posterior Lateral (VPL) Thalamus Post Central Gyrus

PROPRIOCEPTION, FINE TOUCH, VIBRATION Receptors in muscles, joints and tendons Dorsal root ganglion  ipsilateral dorsal white column Lumbosacral input  fasciculus gracilis Thoracocervical input  fasciculus cuneatus Synapse nucleus gracilus and cuneatus Ascend via Medial lemniscus midbrain Ventroposterior Lateral Thalamus Post Central Gyrus

SENSATION FROM FACE Input via the trigeminal nerve (Cranial nerve V) Opthalmic (V 1 ), Maxillary (V 2 ) and Mandibular (V 3 ) branches Projections to trigeminal ganglion (pons) and nucleus (medulla) Fibers cross and ascend to the Ventral Posterior Medial (VPM) Thalamus

GENERAL SENSATION Pain and temperature Pressure and crude touch Proprioception, fine touch and vibration REVIEW

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