3 Flashcards
Where does the spinal cord end
L1-L2
Only at T1-L2 spinal segments, cell bodies of preganglionic sympathetic neurons
Lateral horn
Sensory tracts
Dorsal column
Sensory and motor tracts
Lateral Column
Motor tracts
Anterior column
What info does the fasiculus cutaneus carryy
Info from upper extremity
What info does the fasiculus gracilis carry
Info from lower extremity and lower trunk
Info the dorsal column carries
Discrimative Touch and proprioception (conscious)
Travels to the thalamus from spine
Conscious pain and temp info
Spinothalamic
Carries unconscious pain and temp info, alerting and arousal
Reticulospinal
Primary motor output (voluntary fine motor control) Medial is about 10% and does not cross while the lateral crosses in the medulla
Corticospinal
Gross motor movements and posture control
Reticulospinal
Reflexive turning of the head
Tectospinal
What does the spinothalamic control
Conscious pain and temp
Signs of peripheral nerve distribution
Paresis or paralysis Sensory loss Abnormal sensations Muscle atrophy Reduce or absent DTR
Clinical signs for UMN
Paresis
Spasticity
Hypertonia
Hyperreflexia
Clinical signs for LMN
Loss of reflexes
Atrophy
Flaccid paralysis
Fibrillations/Fasciculations
Rexed lamina II
Substantia gelatinosa
Processes pain info
Rexed lamina III and IV
Nucleus proprius
Processes conscious proprioception and discrminative touch
Clarkes column in Rexed lamina VII
Nucleus dorsalis
Relays unconscious proprioceptive into to cerebellum
Carries conscious touch and proprioception sensory info
Dorsal column
Carries conscious pain and temperature sensory info
Spinothalamic pathway
Carries alerting and arousal sensory info
Spinoreticular pathway
Carries unconscious proprioception sensory info
Spinocerebellar pathway
What info does the dorsal column carry
Sensory tough and proprioception from limbs
Dorsal column pathway
Ascend in dorsal column to ipsilateral medulla
Synapse in medulla
Crosses spinal cord and ascends in medial leminiscus to contralateral thalamus
Ascends to cortex
What info does the spinothalamic pathway carry
Pain and temp sensory info from limbs
Sinothalmic pathway
Enters spinal cord and synapses in dorsal horn Crosses to contralateral spinal cord Ascends in spinothalmic tract Synapses in thalamus Ascends to cortex
Voluntary movement and fine motor control
Corticospinal
Gross motor movements
Rubrospinal
Trunk movements, postural control
Reticulospinal
Trunk movements; postural control
Vestibulospinal
Reflexive movement of head
Tectospinal
Corticospinal info
Voluntary movement and fine motor control
Rubrospinal info
Gross motor movements
Reticulospinal info
trunk movements, postural control
Vestibulospinal info
Trunk movements; postural control
Tectospinal info
Reflexive movements of head
Corticospinal tract
Cell body in motor cortex
Crosses in medullary pyramid
Descends in lateral column
Synapses with alpha motor neurons
Rubrospinal tract
Cell body in red nucleus
Crosses immediately
Synapses with alpha motor neurons
