Gray/White matter Processing (chap 13)

What does the dorsal ramus supply?

The dorsal ramus supplies the back, carrying sensory information from the skin of the back and back muscles.

What does the ventral ramus supply?

The ventral ramus supplies the front and limbs, carrying sensory information from the arms, legs, body wall, and ventrolateral body surface.

What type of information do sympathetic nerves carry?

Sympathetic nerves carry visceral sensory information, meaning signals from internal organs.

What is the key idea regarding sensory information entry?

All sensory information enters through the dorsal root.

What is somatic sensory information?

Somatic sensory information refers to sensations from the body wall or body surface, such as touch and pain on skin.

What is visceral sensory information?

Visceral sensory information refers to sensations from internal organs, such as nausea and visceral pain.

What is the flow of information from sensory receptors to the spinal cord?

1. Sensory receptors detect stimulus; 2. Signal travels through dorsal ramus, ventral ramus, or sympathetic pathway; 3. Enters spinal nerve; 4. Passes through dorsal root ganglion; 5. Enters dorsal horn of spinal cord gray matter.

What is the function of the dorsal root ganglion?

The dorsal root ganglion contains sensory neuron cell bodies.

What is the simple highway analogy used for in the lecture?

The small roads (dorsal ramus/ventral ramus) collect information, merging onto the main highway (spinal nerve → dorsal root), then entering the spinal cord for processing.