Practical NeuroanatomyPractical NeuroanatomyLecture 4Lecture 4

Christine Hulette MDChristine Hulette MD

Practical NeuroanatomyPractical NeuroanatomyLecture 4Lecture 4

Christine Hulette MDChristine Hulette MD

General Sensation and ReviewGeneral Sensation and Review

PAIN AND TEMPERATUREPAIN AND TEMPERATUREPAIN AND TEMPERATUREPAIN AND TEMPERATURE

Receptors in dermis and epidermisReceptors in dermis and epidermis

Dorsal root ganglion Dorsal root ganglion dorsal horn of spinal cord dorsal horn of spinal cord

Cross to lateral spinothalamic tract and ascend to Ventral Cross to lateral spinothalamic tract and ascend to Ventral Posterior Lateral (VPL) nucleus of the ThalamusPosterior Lateral (VPL) nucleus of the Thalamus

Post Central GyrusPost Central Gyrus

Reflex arc present at the spinal cord levelReflex arc present at the spinal cord level

behavioralphys.wikispaces.com behavioralphys.wikispaces.com

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

PRESSURE AND CRUDE TOUCHPRESSURE AND CRUDE TOUCHPRESSURE AND CRUDE TOUCHPRESSURE AND CRUDE TOUCH

Receptors in dermisReceptors in dermis

Dorsal root ganglionDorsal root gangliondorsal horn of spinal corddorsal horn of spinal cord

Ventral Spinothalamic TractVentral Spinothalamic Tract

Ventral Posterior Lateral (VPL) ThalamusVentral Posterior Lateral (VPL) Thalamus

Post Central GyrusPost Central Gyrus

PROPRIOCEPTION, FINE TOUCH, PROPRIOCEPTION, FINE TOUCH, VIBRATIONVIBRATION

PROPRIOCEPTION, FINE TOUCH, PROPRIOCEPTION, FINE TOUCH, VIBRATIONVIBRATION

Receptors in muscles, joints and tendonsReceptors in muscles, joints and tendons

Dorsal root ganglionDorsal root ganglionipsilateral dorsal white columnipsilateral dorsal white column

Lumbosacral inputLumbosacral inputfasciculus gracilisfasciculus gracilis

Thoracocervical inputThoracocervical inputfasciculus cuneatusfasciculus cuneatus

Synapse nucleus gracilus and cuneatusSynapse nucleus gracilus and cuneatus

Ascend via Medial lemniscus midbrainAscend via Medial lemniscus midbrain

Ventroposterior Lateral ThalamusVentroposterior Lateral Thalamus

Post Central GyrusPost Central Gyrus

SENSATION FROM FACESENSATION FROM FACESENSATION FROM FACESENSATION FROM FACE

Input via the trigeminal nerve (Cranial nerve V)Input via the trigeminal nerve (Cranial nerve V)

Opthalmic (VOpthalmic (V11) , Maxillary (V) , Maxillary (V22) and Mandibular (V) and Mandibular (V33) branches) branches

Projections to trigeminal ganglion (pons) and nucleus (medulla)Projections to trigeminal ganglion (pons) and nucleus (medulla)

Fibers cross and ascend to the Ventral Posterior Medial (VPM) Fibers cross and ascend to the Ventral Posterior Medial (VPM) ThalamusThalamus

GENERAL SENSATIONGENERAL SENSATIONGENERAL SENSATIONGENERAL SENSATION

Pain and temperaturePain and temperature

Pressure and crude touchPressure and crude touch

Proprioception, fine touch and vibrationProprioception, fine touch and vibration

REVIEWREVIEW

THE ENDTHE ENDTHE ENDTHE END