The Nervous pathway

SHANDONG UNIVERSITY

Liu Zhiyu

Conscious proprioceptive and fine touch pathway

of trunk and limbs

Spinal ganglion 1°neuron

Fasciculus gracilis

Fasciculus cuneatus

Gracile and cuneate nuclei2°neuron

Decussation of medial lemniscus

Medial lemniscus

VPL 3°neurons

Central thalamic radiation

T4

Unconscious proprioceptivepathway of trunk and limbs

Spinal ganglion

Posterior spinocerebellar tract

Anterior Spinocerebellartract

Lamina -Ⅴ Ⅶ

Inferior cerebellar peduncle

Superior cerebellar peduncle

Nucleus thoracicus

Spinal ganglia1°neuron

Lamina , ~Ⅰ Ⅳ Ⅶ 2°neuron

Lateral spinothalamic tract

anterior spinothalamic tract

Spinal lemniscus

VPL 3°neurons

Central thalamic radiation

Pain, temperature and crude touch pathway of trunk and limbs

Trigeminal ganglionGeniculate ganglion of facial n.Sup. ganglions of glossopharangeal n. and vagus n.1°neuron

Pontine nucleus of V 2°neuron

Spinal nucleus of V 2°neuron

Trigeminal lemniscus Trigeminothalamic tract

Spinal tract of trigeminal n.

VPM 3°neurons

Central thalamic radiation

Pain, temperature and crude touch pathway of head and face

Optic nerve

Optic chiasma

Optic tract

Lateral geniculate body

Optic radiation

Visual area

Pathway for pupillary light reflex

Pretectal area

Accessory oculomotor nuclei

Occculomotor n.

Ciliary ganglia

Sphincter pupilCiliary muscle

Pretectal area

Accessory oculomotor nuclei

Occculomotor n.

Ciliary ganglia

Sphincter pupilCiliary muscle

Auditory pathway

Spinal organ

Bipolar neuron of cochlear ganglion

Cochlear nerve

Cochlear nuclei

Trapezoid body

Lateral lemniscus

Medial geniculate body

Acoustic radiation

Transverse temporal gyrus

Inferior coliculus

Corticospinal tract

Corticospinal tract

Decussation of pyramid

Lateral corticospinal tractAnterior corticospinal tract

upper motor neuron

Lower motor neuron

Corticonuclear tract

Nucleus of oculomotor n.

Nucleus of trochlear n.

Motor nucleus of trigeminal n.

Nucleus of abducent n.

Sup. part of nucleus of facial n.

Inf. part of nucleus of facial n.

Nucleus of ambiguus

Nucleus of accessory n.

Nucleus of hypoglossal n.

Extrapyramidal System

Extrapyramidal system

Babinski reflex - an UMN sign Adult response - plantar flexion of the big toe and adduction of

the smaller toes Pathological (Infant) response - dorsoflexion (extension) of

the big toe and fanning of the other toes Indicative of upper motor neuron damage