Surgical Diseases of the Spinal Cord and Nerve Roots Flashcards
How many cervical vertebrae are there?
7
How many spinal nerves are there?
8
How many thoracic vertebrae are there?
12
How many thoracic spinal nerves are there?
12
How many lumbar vertebrae are there?
5
How many lumbar spinal nerves are there?
5
What type of joint is found between each vertebrae?
Intervertebral disc
Fibrous joint
Where is the nucleus pulposus located?
In the centre
Where is the annulus fibrosus located?
On the periphery of the nucleus pulposus
What structures do you pass through when performing a Lumbar puncture?
Supraspinal ligament, Interspinal ligament, Ligamentum flavum, dura
What is the 1st pop heard on a LP?
Going through ligamentum flavum
What is the 2nd pop on LP?
Going through the dura matter
Whats does the anterior horn of the spinal cord contain
Motor cell ganglia (cell bodies)
Where does the spinal cord extend from and to?
C1-L2
Where is a LP typically performed?
L4/L5
What does the spinal cord end as?
Cornus medularis
What does the spinal cord nerve extend as?
Cauda equina
Where does the spinal cord terminate?
Filum terminale
What is the myotome for C5?
Elbow flexors
What is the myotome for C6?
Wrist extensors
What is the myotome for C7?
Elbow extensors
What is the myotome for C8?
Finger flexers
What is the myotome for T1?
Finger abduction
Intrinsic finger muscles
What is the myotome for L2?
Hip flexors
What is the myotome for L3?
Knee extensors
What is the myotome for L4?
Ankle dorsiflexors
What is the myotome for L5?
Big toe extensors
What is the myotome for S1?
Ankle Plantar Flexors
What is a myotome?
Group of muscles that a single nerve innervates
What is a dermatome?
An area of the skin supplied by nerves from a single spinal root
Is weakness present in UMN or LMN lesions?
Both
Is atrophy present in UMN of LMN lesions?
LMN
Are reflexes increased in UMN or LMN lesions?
UMN
Are reflexes decreased in UMN or LMN lesions?
LMN
Is tone increased in UMN or LMN lesions?
UMN
Are fasiculations present in UMN or LMN lesions?
LMN
o Weakness in elbox below o Sensory level at C6 o Increased tone in legs o Brisk reflexes o Babrinski +ve What is the problem?
Myelopathy - UMN - neurlogical deficit due to compression of the spinal cord
What are the categories of problems concerning the spinal cord?
Degenerative Congenital Trauma Infection Tumour
What is a disc prolapse?
Acute herniation of intervertebral disc causing compression of spinal root or spinal cord
What is the investigations for disc prolapse?
MRI
Who does disc prolapse tend to affect?
Younger patients
What are the symptoms of disc prolapse?
Acute onset pain
Acute pain down leg/arm
Numbness (sensory) and weakness (motor) in distribution of nerve root involved
What is the management for disc prolapse?
Rehabilitation
Nerve root injections
Lumbar/cervical discectomy
Is cauda equina syndrome a medical emergency?
Yes
What are the red flag symptoms for cauda equina syndrome?
Bilateral sciatica
Saddle anaethesia
Urinary dysfunction
What does cauda equina syndrome require urgently?
MRI
What is the treatment for cauda equina syndrome?
Emergency lumbar discectomy
What is cervical spondylosis?
Umbrella term for degenerative changes in cervical spine leading to spine and nerve root compression
What is lumbar spinal stenosis?
Image result for lumbar spinal stenosiswww.spine-health.com
Lumbar spinal stenosis is a narrowing of the spinal canal in the lower back,
What are the symptoms of lumbar spinal stenosis?
Pain down both legs (spinal claudication)
Worsening on walking/standing and relieved by sitting or bending forward
What is the treatment or lumbar spinal stenosis?
Lumbar laminectomy
What is a lumbar laminectomy?
Surgical procedure that creates space by removing the lamina
Enlarging the spinal canal to relieve pressure on the cord
What % of spinal tumours are intradural?
40%
What % of tumours are extra dural?
55%
What % of tumours are intramedullary?
5%
Where are common primary sites for spinal cord tumours?
Lung
Breast
Prostate
If the patient has a known cancer and presents with back pain what should be ordered immediately?
MRI
What is osteomyelitis?
Infection within vertebral body
What is discitis?
Infection of intervertebral disc
What is an epidural abscess?
Infection in the epidural space
What are the 3 main symptoms for an epidural abscess?
Back pain
Pyrexia
Focal Neurology
What are the risk factors for epidural abscess?
IV drug abuse
Diabetes
Chronic renal failure
Alcoholism
What are the responsible organisms for epidural abscess?
Staph aureus, streptococcus, E.coli
What is the treatment for epidural abscess?
Urgent surgical decompression
Long term IB Antibiotics
What are the risk factors for oesteomyelitis?
IV drug abuse, diabetes, chronic renal failure, alco