Neuranatomy: Ascending Spinal Cord Pathways

Front 1

Somatic sensations include

Back 1

discriminative touch, vibration, proprioception, crude touch, termperature and pain

Front 2

The two most important ascending pathways are

Back 2

Dorsal column - medial lemniscal and spinothalmic

Front 3

The dorsal column systems carries

Back 3

conscious apprecaition of cuteanous (discriminative touch, steognosis) and conscious apprecaition of proprioception (position sense)

Front 4

Deine: Stereognosis

Back 4

Recogintion of 3D space

Front 5

Stereognosis

Back 5

fine form and texture discriination

Front 6

Peripheral mechanoreceptors include those for

Back 6

discriminative touch, vibration, proprioception (include muscle stretch receptors)

Front 7

Define: Kinesthesia

Back 7

Awarness of movement at joints and degree of muscle contraction

Front 8

Two fasciculi of the dorsal column

Back 8

Fasiculus gracilis, fasiculus cuneatus

Front 9

Function of FG

Back 9

Carries informatrion principally from lower limb and lower portions of body (T6 and below)

Front 10

Function of FC

Back 10

Carries information from the upper limbs and portions (T6 and above)

Front 11

The axons from FC and FG synapse in the _____ and ____ in the medulla

Back 11

nucleus gracilis and nucleous cuneatus

Front 12

Axons deccusate in the dorsal system a the _____ and form the contrlateral _______

Back 12

Senosry decussation; nedial lemniscus

Front 13

Fibers of the medial lemniscus carrying touch, vibration and proprioceptive information synapse in the _________ of the thalamus

Back 13

ventral, posteriorlateral nucleus (VPL) of the thalamus

Front 14

Axons from the VPL ascend via the posterior limb of the internal capsule and synapse in a wide region including a string projection to the _________

Back 14

postcentral gyrus

Front 15

Dorsal column signs from damage to the dorsal region include

Back 15

impaired vibration sense, inability to determine limb position, asterognosis, impaired two point discrimination; shuffling inccordinated gait, Romberg's sign (sway to side of the region)

Front 16

The type of information carried by the STT includes:

Back 16

Pain, temperature and nondiscriminative touch

Front 17

Disruption of the STT can produce symnptoms including

Back 17

hypesthesia (reduced sensation), parasthesia (tingling), anaesthesia (no feeling)

Front 18

Many Dorsal root fibers enter _____ in STT prior to entering substancia gelatinosa

Back 18

Lissauer's tract

Front 19

DRG fibers carrying pain information synapse primarily in the _______

Back 19

substancia gelatinosa

Front 20

Axons of interneurons cross the midline via the anterior white commisure to form the ________

Back 20

Contralateral spinothalamic tract

Front 21

Axons ascend the contralateral STT to reach ____

Back 21

brainstem reticular formation and the thalamus (VPL)

Front 22

Brainstem reticular formation is important for changes in ________

Back 22

level of attention to response and pain

Front 23

VPL of thalamus is responsible for ____

Back 23

conscious awareness of pain and temperature

Front 24

Axons from teh VPL nucleus project to ____

Back 24

postcentral gyrus including primary somatosenatory cortex, somatosenosry cortex

Front 25

Damage to STT produces _______

Back 25

No significant tactile deficits because information is also carried in dorsal system