Spinal Cord Flashcards
of Cervical Vertebrae
7
of Thoracic Vertebrae
12
of Lumbar Vertebrae
5
of Sacral and Coccygeal Vertebrae
1
Lies within the vertebral canal
Spinal Cord
What ligament holds the Spinal Cord in position?
Denticulate Ligament
Holds the Spinal cord inferiorly
Filum Terminale
Fibrous membrane that protects the spinal cord
Meninges ( Dura Mater, Arachnoid Mater, Pia Mater)
Is the spinal cord is shorter/longer than the spinal column?
Shorter
Posterior Part of Spinal column
Sensory
Anterior part of Spinal column
Motor
What is the level of termination of the Spinal Cord in the Spinal Column?
lower border of L1 verterbrae
3 Columns in the White matter
Posterior, Lateral, Anterior Funiculus
3 Parts of the Gray Matter
Posterior, Lateral, Anterior Horn
Location of Laminae I-VI
Posterior Gray Horn
Location of Laminae VII
Lateral Gray Horn
Location of Laminae VIII and IX
Anterior Gray Horn
Location of Laminae X
Gray substance surrounding the Central Canal
2 Fasciculi of the Dorsal White Column
Gracile and Cuneate Fasciculus
Origin of Anterior Spinal Artery
Vertebral Artery
Origin of Paired Posterior Spinal Arteries
Vertebral Artery
Origin of Artery of Adamkiewiscz
Aorta
Sensory modalities for Dorsal Column
Position Sense, 2 point Discrimination, Fine Discriminative Touch, Vibration Sense and Stereognosis
Sensory modalities for Anterior Spinothalamic Tract
Touch and Pressure
Sensory modalities for Lateral Spinothalamic Tract
Pain and Temperature
Tracts of Anterior Fasciculus
Anterior Corticospinal, Vestibulospinal, Tectospinal, and Reticulospinal
Tracts of Lateral Fasciculus
Lateral Corticospinal and Rubrospinal
Tracts of Posterior Fasciculus
Medial Lemniscus(Cuneate and Gracile)
Pyramidal System Function
voluntary control of muscles
Pyramidal System Tracts
Anterior and Lateral Corticospinal, and Corticobulbar
Origin of pyramidal system in the brain
Primary Motor Cortex
extension of axons of Pyramidal system
Brainstem and Spinal Cord
decussation of LCST
lower medulla
Descending pathways are also referred to as?
Upper Motor Neurons
Final descending common pathways for the control of skeletal muscle activity
Lower Motor Neurons
Atrophy
LMNL
Spasticity
UMNL
Flaccidity
LMNL
Fasciculations
LMNL
Clonus
UMNL
Pathologic Reflexes
UMNL
Hypertonicity
UMNL
Hypotonicity
LMNL
In CSPT, When lesion is above the decussation, what side does symptoms manifest?
Contralateral
In CSPT, When lesions is below the decussation, what side does symptoms manifest?
Ipsilateral
bilateral damage in C4-C6 vertebrae causes?
quadriplegia
Unilateral spinal cord lesions in thoracic levels may result in?
paralysis of the ipsilateral lower extremity (monoplegia)
If thoracic cord damage is bilateral?
Paraplegia (paralysis of lower extremities)
In spinal shock, all cord functions below/above the level of lesion are lost?
below
Determines Spinal shock
Activity of Anal sphincter reflex
In sSringomyelia, what modality/ies of sensation is are lost?
Pain and temperature (Cervical)
affected site of SC in Poliomyelitis?
Anterior horn
Poliomyelitis causes
LMNL symptoms
cause of Tabes Dorsalis
Neurosyphilis
Tract involved in Tabes Dorsalis
Dorsal Column
Degeneration of anterior horn cells and corticospinal tract but no sensory loss
Amyotrophic lateral sclerosis
Caused by vitamin B12 deficiency, the posterior and lateral columns degenerate
Subacute combined degeneration
Contralateral loss of Pain&Temp, Ipsilateral loss of proprioception
Brown-Sequard’s Syndrome
Another name for Brown-Sequard’s syndrome
Spinal Cord Hemisection
Dermatome level for Umbilicus
T10
Dermatome level for middle finger
C7
Dermatome level for perineum
S5
Dermatome level for Big toe
L4-L5
Dermatome level for Thumb
C6
indicates an absence of position sense in the lower limbs
Romberg’s Sign
Large lesion on the Central cord causes?
LMN deficits, CST damage, and Posterior Column damage
Small lesion on the Central cord causes?
loss of Pain and Temperature sense on the upper extremities
of Cervical Spinal Nerve
8
of Thoracic Spinal Nerve
12
of Lumbar Spinal Nerve
5
of Sacral Spinal Nerve
5
of Coccygeal Spinal Nerve
1
of Spinal Nerves
31 pairs
of Spinal Vertebrae
33 pairs