lOMoAR cPSD| 70487227
lOMoAR cPSD| 70487227
BIOL 260 Human Anatomy Chapter 17: Pathways and
Integrative Functions
Posterior Funiculus–Medial Lemniscal Pathway
This pathway conducts sensory information about limb
position, fine touch, precise pressure, and vibration.
Anterolateral Pathway
This pathway conducts crude touch, pressure, pain, and
temperature sensations toward the brain. Decussation of axons
occurs at the level where the primary neuron axon enters the
spinal cord.
, lOMoAR cPSD| 70487227
Spinocerebellar Pathway
This pathway conducts proprioceptive information to the
cerebellum through both the anterior and posterior
spinocerebellar tracts. Only some axons decussate, and these
do so at the level where the primary neuron axon enters the
spinal cord. This pathway uses only primary and secondary
neurons.
Motor Pathways in the Spinal Cord
Bilaterally symmetrical motor pathways descend from both the
cortex and the brainstem into the spinal cord. Tract names
indicate their point of origin and the spinal cord as their
destination.
Corticospinal Tracts
Corticospinal tracts originate as collections of motor neurons
within the motor cortex of the cerebrum and synapse on motor
neurons within the anterior horns of the spinal cord to control
voluntary motor activity.
lOMoAR cPSD| 70487227
BIOL 260 Human Anatomy Chapter 17: Pathways and
Integrative Functions
Posterior Funiculus–Medial Lemniscal Pathway
This pathway conducts sensory information about limb
position, fine touch, precise pressure, and vibration.
Anterolateral Pathway
This pathway conducts crude touch, pressure, pain, and
temperature sensations toward the brain. Decussation of axons
occurs at the level where the primary neuron axon enters the
spinal cord.
, lOMoAR cPSD| 70487227
Spinocerebellar Pathway
This pathway conducts proprioceptive information to the
cerebellum through both the anterior and posterior
spinocerebellar tracts. Only some axons decussate, and these
do so at the level where the primary neuron axon enters the
spinal cord. This pathway uses only primary and secondary
neurons.
Motor Pathways in the Spinal Cord
Bilaterally symmetrical motor pathways descend from both the
cortex and the brainstem into the spinal cord. Tract names
indicate their point of origin and the spinal cord as their
destination.
Corticospinal Tracts
Corticospinal tracts originate as collections of motor neurons
within the motor cortex of the cerebrum and synapse on motor
neurons within the anterior horns of the spinal cord to control
voluntary motor activity.
