Tutorial title - Sensory Receptors - Lissauer's and Spinothalamic tract
3 important questions on Tutorial title - Sensory Receptors - Lissauer's and Spinothalamic tract
What kind of sensory pathway is the spinothalamic tract? What are the 2 tracts called?
a sensory pathway for pain, temperature, crude touch (you know you are being touched, but you cannot tell the exact spot, shape, or texture of what touched you) .
anterolateral system = Anterior + Lateral spinothalamic tract
Lateral spinothalamic tract: Carries signals for pain and cold or hot temperature.
Anterior spinothalamic tract: Carries signals for crude touch and firm pressure
anterolateral system = Anterior + Lateral spinothalamic tract
Lateral spinothalamic tract: Carries signals for pain and cold or hot temperature.
Anterior spinothalamic tract: Carries signals for crude touch and firm pressure
What is the relationship between lissauer's tract and Spinothalamic tract?
When sensory signals for pain, temperature, and crude touch enter the spinal cord, the first-order neurons travel up or down a segment or two through Lissauer's tract then synapse in on the spinal gray matter of second order neurons, which then cross over and go up the spinothalamic tract to the thalamus
What are the 4 pathway steps between lissauer's and spinothalamic tract?
First-order neurons → Lissauer's tract → Crossing over → Synapse into 2nd order neurons →
second-order neurons: Ascend through the spinothalamic tract (part of the anterolateral system) contralateral to the original stimulus → Third-order neurons: Project from the thalamus to the primary somatosensory cortex
second-order neurons: Ascend through the spinothalamic tract (part of the anterolateral system) contralateral to the original stimulus → Third-order neurons: Project from the thalamus to the primary somatosensory cortex
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