Changes

====1. Dorsal Columns====

====1. Dorsal Columns====

Dorsal columns transmit information from touch and kinaesthesia; these are both classified as low threshold information. There are two major dorsal columns; the ''gracile fasiculus'' situated medially which conveys information from the hindlimbs and caudal trunk and the ''cuneate fasciculus'' which is situated more laterally and conveys information from the forelimbs and cranial trunk.

Dorsal columns transmit information from touch and kinaesthesia; these are both classified as low threshold information. There are two major dorsal columns; the ''gracile fasiculus'' situated medially which conveys information from the hindlimbs and caudal trunk and the ''cuneate fasciculus'' which is situated more laterally and conveys information from the forelimbs and cranial trunk.

 

====2. Spinothalamic Tracts====

====2. Spinothalamic Tracts====

*Transmits information from temperature and "pin prick" pain.

Spinothalamic tracts transmit information from temperature and "pin prick" pain; these senses are classified as fast, initial pain sensations. These tracts compare with the [[Sensory Pathways - Anatomy & Physiology#Ascending Reticular Formation|ascending reticular formation]].

*Fast, intial pain sensation

*Compare with [[Sensory Pathways - Anatomy & Physiology#Ascending Reticular Formation|ascending reticular formation]]

====3. Spinocervicothalamic Tracts====

====3. Spinocervicothalamic Tracts====

*Transmits information from touch and kinaesthesia.

The spinocervicothalamic tracts transmit information from touch and kinaesthesia, although these are absent in man.

*Absent in man

===Spinocerebellar Tracts===

===Spinocerebellar Tracts===

[[Image:TheSpinocerebellarTract.jpg|thumb|right|150px|Spinocerebellar Tract - © Sarah Hamilton 2008]]

[[Image:TheSpinocerebellarTract.jpg|thumb|right|150px|Spinocerebellar Tract - © Sarah Hamilton 2008]]

*Transmits information from proprioception receptors, including information from muscle receptors, joint receptors and golgi tendon organs.

These tracts transmit information from proprioception receptors, including information from muscle receptors, joint receptors and golgi tendon organs. Most sensory information enters the [[Spinal Cord - Anatomy & Physiology|spinal cord]] on the ipsilateral side to the stimulus but some do cross to the contralateral side of the body. Contralateral signals pass back to the ipsilateral side of the body in the brain. Information is processed in the [[Hindbrain - Anatomy & Physiology#Cerebellum|cerebellum]] and is therefore processed unconsciously.

*Most sensory information enters the [[Spinal Cord - Anatomy & Physiology|spinal cord]] on the ipsilateral side to the stimulus, some crosses to the contralateral side of the body.

 

**Contralateral signals pass back to the ipsilateral side of the body in the brain.

*Information is processed in the [[Hindbrain - Anatomy & Physiology#Cerebellum|cerebellum]] and is therefore processed unconsciously.

The dorsal spinocerebellar tract relays muscle spindle and golgi tendon organ information from the hindlimbs to the [[Hindbrain - Anatomy & Physiology#Cerebellum|cerebellum]].

*The '''dorsal spinocerebellar tract''' relays muscle spindle and Golgi tendon organ information from the hindlimbs to the [[Hindbrain - Anatomy & Physiology#Cerebellum|cerebellum]].

 

* The '''cuneo-cerebellar tract''' serves the same purpose for the forelimbs, but is much smaller.

* The '''ventral spinocerebellar tract''' is similar to the dorsal spinocerebellar tract but it takes a less direct route to the [[Hindbrain - Anatomy & Physiology#Cerebellum|cerebellum]].  

The cuneo-cerebellar tract serves the same purpose for the forelimbs as the dorsal spinocerebellar tract does for the hind limbs, but is much smaller.

** The forelimb equivalent is called the '''rostral spinocerebellar tract'''.

 

The ventral spinocerebellar tract is similar to the dorsal spinocerebellar tract but it takes a less direct route to the [[Hindbrain - Anatomy & Physiology#Cerebellum|cerebellum]]. The forelimb equivalent is called the rostral spinocerebellar tract.

===Ascending Reticular Formation (Spinoreticular Tract)===

===Ascending Reticular Formation (Spinoreticular Tract)===