Spinal Cord

SPINAL CORD Dr. Bernadett Pua Velasco

Spinal Cord FG

T

C

S

FC

L

LCST

L

T

TS

t T

SO

a

t

S

T

ST S

A C S T

n

C

A

S

V S T

A

Column

Ascending

Descending

Anterior

Anterior Spinothalamic

Anterior Corticospinal Vestibulospinal Anterior Reticulospinal Tectospinal

Posterior

Fasciculus Gracilis None known Fasciculus Cuneatus

Lateral

Lateral Spinothalamic Dorsal Spinocerebellar Ventral Spinocerebellar Spinotectal Lissauer’s or posterolateral tract Spinoreticular Tract

Lateral Corticospinal Rubrospinal LateralnReticulospinal Olivospinal Descending Autonomic fiber Tract

Ascending Pathways Dorsal Column

Skin, Joints, Tendon

Dorsal Column nuclei

Dorsal Column

Spinoth alamic

Skin

Dorsal Horn

Sharp pain, T, Crude touch

Fine touch, proprioc eption, 2pt discrimi nation Ventrola teral column

Ascending Pathways

Dorsal Muscle spinocer spindle, ebellar GTO, Touch and P receptor Ventral s Muscle Spinocer spindle, ebellar GTO, Touch and P receptor

Cerebell Moveme Lateral um nt and column position mechani sm Cerebell Moveme Lateral um nt and column position mechani sm

Ascending Pathways Spinoret Deep icular somatic structur Spinotec es Spinal tal cord Spinoolivary

Spinal Cord

Reticula r Formati on Tectum, midbrai n Inferior olivary nucleus

Deep and chronic pain Headeye moveme nt Postural reflexes reflex mechani sm

Ventrola teral column Ventral column Ventral column

Descending Pathways Motor AHC

Lateral Corticos and pinal premoto r cortex

Anterior Motor AHC Corticos and pinal premoto r cortex

Fine motor function Modulati on of sensory function Gross and postural motor function

Lateral column

Anterior column

Descending Pathways Vestribu Lateral AHC lospinal and medial Vestibul ar Rubrospi nucleus Red Ventral nal nucleus horn interneu rons

Postural Ventral reflexes column

Motor Lateral function column

Descending Reticulo Reticula Dorsal Pathways

Modulati spinal r and on of formatio Ventral sensory n horn transmis sion, modulati on of spinal reflexes Descend Hypotha Pregang Modulati ing lamus, lionic on of autono BS neurons autono mic nuclei mmic function

Anterior column

Lateral column

Descending Pathways Tectospi Midbrain Ventral nal horn interneu rons Medial Vestibul Cervical longitudi ar nuclei gray nal fasciculu s

Reflex head turning

Ventral column

Coordin Ventral ation of column head and eye moveme nt

Motor pathway Cerebral Cortex

Cerebral Cortex

Cervicomedullary Junction

Anterior CST

Lateral CST

AHC

AHC

Striated Muscle

Striated Muscle

Pain Pathway Postcentral gyrus

Postcentral gyrus

Thalamus

Thalamus

Cervicomedullary Junction

PHC

PHC

DRG

DRG

FNE

FNE

Proprioception Pathway Postcentral gyrus

Postcentral gyrus

Thalamus

Thalamus

Medulla Cervicomedullary Junction

PHC DRG Muscle spindle

PHC DRG Muscle Spindle