文档介绍：Nervous Pathway
Ⅰ. The Sensory (Ascending) Pathways
Ⅰ) The deep sensory (or the proprioceptive) pathways
conscious deep sensory pathways
1).The deep sensory and fine touch pathways of trunk and limbs
The first neurons: spinal ganglion
The second neurons: gracile and
cuneate nuclei
The first neurons: ventroposterior
lateral nucleus
Decussation of medial lemniscus
Lesion : hemiplegia
Receptors
muscles tendon periosteum and joint
Spinal nerve
(peripheral processes)
Spinal ganglia
The first neurons
Dorsal roots
(medial bundle)
(Central processes : fasciculus cuneatus and gracilis)
Gracile and cuneate nuclei
The second neurons
thalamocortical tract
Running through the posterior limb of the internal capsule
Cortex of the cerebrum
Decussation of medial lemniscus
The third neurons
Ventroposterior lateral nucleus
Medial lemniscus, through the medulla oblongata pons and midbrain
unconscious deep sensory pathway
Receptors
muscles tendon periosteum and joint
Spinal nerve
(peripheral processes)
Spinal ganglia
The first neurons
Dorsal roots
(Central processes)
Thoracic nucleus of C8-C12 and lateral part of laminaⅤ-Ⅶ of lumbosacral enlargement
The second neurons
The anterior and posterior spinocerebellar tracts
By way of the superior and inferior cerebellar peduncles
Cortex of the cerebellum
Ⅱ) The superficial sensory pathways
superficial sensory pathway of trunk and limbs
1).The pathway concerned with pain and thermal sensations
The first neurons: spinal ganglion
The second neurons: nucleus proprius
The first neurons: ventroposterior
lateral nucleus
Cross through the anterior missure
Receptors
Cutaneous exteroceptor of the trunk and limbs
Spinal nerve
(peripheral processes)
Spinal ganglia
The first neurons
Dorsal roots
(lateral bundle)
(Central processes : dorsolateral fasciculus)
Nucleus proprius
The second neurons
thalamocortical tract
Running through the posterior limb of the internal capsule
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