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CNS_Part1

CentralNervousSystem_Part1

QuestionAnswer
What is the GRAY MATTER associated with? INTEGRATION of information
What is the WHITE MATTER associated with? FLOW of INFORMATION
What are the EFFERENT tracts? 1. PYRAMIDAL tracts 2. EXTRAPYRAMIDAL tracts
What are the PYRAMIDAL tracts? Cross over pyramid of medulla 1. LATERAL corticospinal 2. ANTERIOR corticospinal
What are the EXTRAPYRAMIDAL tracts? 1. rubrospinal 2. reticulospinal 3. vestibulospinal 4. olivospinal 5. tectospinal
What are the AFFERENT tracts? 1. Posterior Column Medial Lemniscus 2. Spinocerebellar 3. Anterolateral System 4. Spino-olivary
What are the POSTERIOR COLUMN-MEDIAL LEMNISCUS tracts? 1. fasciculus gracilus 2. fasciculus cuneatus
What are the SPINOCEREBELLAR tracts? 1. posterior spinocerebellar 2. anterior spinocerebellar
What are the ANTEROLATERAL system? 1. lateral spinothalamic 2. anterior spinothalamic
Which are the SOMATOSENSORY pathways? 1. Posterior Column-Medial Lemniscus tract 2. Spinothalamic tracts
How does the POSTERIOR COLUMN-MEDIAL LEMNISCUS tract travel? 1. ASCENDS in the POSTERIOR columns 2. CROSSES OVER in the MEDIAL LEMNISCUS of the MEDULLA OBLONGATA
What is the function of the POSTERIOR COLUMN-MEDIAL LEMNISCUS tract? Used for: 1. discriminative touch 2. vibration 3. conscious proprioception
How does the SPINOTHALAMIC tract travel? crosses over at level of ENTRANCE INTO SPINAL CORD
What is the function of the SPINOTHALAMIC tract? 1. Simple (crude) touch - anterior 2. pain (most) - lateral 3. temperature - lateral
What are the PROPRIOCEPTIVE pathways (non-conscious)? Spinocerebellar tracts
Where does the SPINOCEREBELLAR TRACT relay its information from? Relay info from GOLGI ORGANS and MUSCLE SPINDLES
Describe the POSTERIOR SPINOCEREBELLAR tract POSTERIOR (dorsal) tract is IPSILATERAL to CEREBELLUM via cerebellar peduncles
Describe the ANTERIOR SPINOCEREBELLAR tract ANTERIOR (ventral) tract contains CROSSED AND IPSILATERAL FIBERS for LOWER LIMBS
How are some some proprioceptive signals in spinocerebellar tracts carried? In the fasciculus cuneatus pathway - upper limbs
What is the SPINO-OLIVARY tract? 1. contains type 1B afferent sensory fibers 2. originate from golgi tendon organs 3. synapse in the olivary nucleus of medulla 4. 2nd order neurons project to the cerebellum
What are the MOTOR pathways? 1. pyramidal tracts 2. extrapyramidal tracts
What do EXTRAPYRAMIDAL tracts play a role in? Coordination of MOVEMENT and POSTURE
What is the RUBROSPINAL tract of the EXTRAPYRAMIDAL tract in charge of? 1. GROSS LIMB MOVEMENT (coordination of swing & walking) 2. Not well formed in humans
What is the RETICULOSPINAL tract of the EXTRAPYRAMIDAL tract in charge of? 1. coordinates MOVEMENTS OF LOCOMOTION & POSTURE 2. influences MUSCLE TONE 3. descends from the RAS (reticular activating system - the 'brain's alarm clock')
What is the TECTOSPINAL tract of the EXTRAPYRAMIDAL tract in charge of? Coordinates HEAD & EYE MOVEMENTS in response to visual and auditory stimuli
What is the VESTIBULOSPINAL tract of the EXTRAPYRAMIDAL tract in charge of? Control of muscles for EQUILIBRIUM including movement of head/neck
Created by: lophung
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