Different Tracts Flashcards
Which sensation does DCML carry?
Fine touch, vibration and conscious proprioception
What sensation does the lateral spinothalamic tract carry?
Pain and temperature
What sensation does the anterior spinothalamic tract carry?
Crude touch
What sensation does the spinocerebellar tract carry
Unconscious proprioception
Define the term anterolateral (spinothalamic)
Is the pathway via which pain signals are carried to the sensory cortex
Define lissauers fasciculus
Crude touch and pressure related axons ascend or descend one or two levels here
What is the substantia gelatinosa (spinothalamic)
The site of the first synapse in the spinothalamic tract
What is the anterior white commissure?
Site of decussation for the 2nd order neuron of the spinothalamic tract
What is miessners corpuscles of the DCML
Skin mechanoreceptors sensitive to fine touch
What is pacinian corpuscles of the DCML
Skin mechanoreceptors sensitive to deep touch
What are Ruffini nerve endings of the DCML
Skin mechanoreceptors sensitive to skin stretch
What are Merkel nerve endings of the DCML
Skin mechanoreceptors sensitive to light touch
Is the spinocerebellar ascending, descending, afferent, efferent, contralateral, ipsilateral pathways?
Ascending, afferent, ipsilateral
What is the role of the spinocerebellar pathway?
Carries unconscious proprioception sensation from the body through the spinal cord to the cerebellum, plays a role in muscular coordination
What is Clarkes nucleus and what is it significance?
It is the beginning of the spinocerebellar pathway, only exists in the spine between L2-C8
Is the spinocerebellar ascending, descending, afferent, efferent, contralateral, ipsilateral pathway?
Ascending, afferent, ipsilateral pathway
What is the spinocerebellar role?
It carries unconscious proprioception to the body, plays an important role in muscle coordination
What is clarkes nucleus and what is it significance
It is the beginning of spinocerebellar pathway, only exist in the spine between L2 -C8
What is the info carried in the ventral spinocerebellar tract
Relays proprioceptive and extroceptive input from the ipsilateral trunk and lower limb. Assists in coordination of lower limb muscles and posture assistance
What is the info carried in the Dorsal spinocerebellar tract
Mainly proprioception from ipsilateral skeletal muscles, joints, tendons in the ipsilateral torso and limb
What is the info carried in the rostral spinocerebellar tract
Relays proprioceptive input primarily from the ipsilateral head and upper limb
What is the info carried in the cuneocerebellar
Relays proprioceptive input primarily from the ipsilateral head and upper limb
What type of specific information is carried in the lateral corticospinal tract?
Conveys commands for fine motor movement of ipsilateral limbs
What type of specific information is carried in the Anterior corticospinal?
Conveys commands for the movements of the contralateral axial muscles
What is the anterior white commissure?
Is a bundle of nerve fibres which cross the midline of the spinal cord, fibres carrying pain sensation in the spinothalamic tract contribute to this commissure as do fibres from the anterior corticospinal tract which carry signals from the primary motor cortex
What type of info is carried in the lateral corticospinal tract
Movement of limbs
What type of info is carried in the anterior corticospinal tract
Axial movement
What type of info is carried in the rubrospinal corticospinal tract
Controlling muscle tone of extensor and flexor muscles
What type of info is carried in the tectospinal corticospinal tract
Fear stimulus movement
What type of info is carried in the reticulospinal corticospinal tract
Respiratory muscles and eye movement
What type of info is carried in the vestibulospinal corticospinal tract
Receives information from the inner ear to monitor and adjust head position
