Dr. Mincer C-Spine Exam Module 5 Flashcards
The supraspinatus ligament is re-named as it continues to the cranium. What is the new name?
- Ligamentum nuchae (or nuchal ligament)
What is the composition of the ligamentum nuchae?
- Fibroelastic (like the ligamentum flavum from the lumbar spine)
What are two functions of the ligamentum nuchae?
- It helps passively support the weight of the head in an upright position (fibroelasticity helps with this)
- It is an important midline attachment for muscles
What is the course of the vertebral artery?
- The vertebral artery is a branch of the subclavian artery
- It ascends through the transverse foramina to the foramen magnum
- It combines with the contralateral vertebral artery to form the Basilar artery
Why is the location of the vertebral artery in the neck particularly important for protecting it?
- It runs at the axis of flexion/extension (mediolateral axis), which helps protect it from excessive stretching or pinching during flexion/extension (other movements can disrupt it more)
What is the vertebral artery’s relationship to cervical nerve roots?
- It is immediately anterior to the cervical nerve roots (inside the vertebral foramen)
What are the classic symptoms of vertebral artery compression? (10)
- 5 D’s
- Dizzines,
- drop attacks
- dysphagia,
- dysarthria, and
- diploplia
- fainting,
- ataxia
- nausea
- numbness of the unilateral face
- nystagmus
Describe the general size and shape of the central (vertebral) canal in the C-spine
- Fairly triangular
- Large relative to the size of the segment
The diameter of the central canal is greatest in what position?
Flexion
The diameter of the central canal is least in what position?
Extension
What is the overall incidence (not words, not numbers) of cancer, infection, and fracture in the C-spine?
- Cancer: relatively uncommon (more often than rare)
- Fracture: rare
- Infection: rare
Who is the Canadian C-Spine Rule for?
- For alert and stable trauma pts where c-spine injury is a concern
Canadian C-Spine Rule: What is the first question, and what are the three things that need yes/no answers?
What do you do next?
- Any High-Risk Factor Which Mandates Radiography?
- Age equal or greater to 65, or
- Dangerous mechanism, or
- Paresthesias in extremities
If yes, send to radiograph
If no to all, ask second question?
Canadian C-Spine Rule: What is considered a dangerous mechanism? (5)
- Fall from elevation equal or greater to 3 feet/5 stairs
- Axial load to head, e.g. diving
- MVC high speed (> 100km/hr), rollover, ejection
- Motorized recreational vehicles
- Bicycle collision
*MVC = Motor Vehicle Collision/Accident
** 100km/hr = 62 mph
Canadian C-Spine Rule: What is the second question, and what are the five things that need yes/no answers?
What do you do next?
Any Low-Risk Factor Which Allows Safe Assessment of Range of Motion?
- Simple rearend MVC*
- Sitting position in ED
- Ambulatory at time
- Delayed** onset of neck pain
- Absence of midline c-spine tenderness
If yes to any, ask question 3
If no to all, send for radiograph
*MVC = Motor Vehicle Collision/Accident
**Delayed: i.e. not immediate onset of neck pain
Canadian C-Spine Rule: What is the third question, and what is the one thing that needs a yes/no answer?
What do you do next?
Able to Actively Rotate Neck?
- 45* left and right
Able, no radiograph
Unable, send for radiograph
Canadian C-Spine Rule: What are four exceptions to the definition of Simple Rearend MVC?
Simple Rearend MVC Excludes:
- Pushed into oncoming traffic
- Hit by bus/large truck
- Rollover
- Hit by high speed vehicle
*MVC = Motor Vehicle Collision/Accident
What is cervical arterial dysfunction?
CAD (cervical arterial dysfunction) describes potential adverse events involving both the
- vertebralbasial system supplying the hindbrain
- internal carotids (supplying the cerebral hemispheres and the retina)
* hindbrain is: Pons, Brainstem, Vestibular apparatus, Medulla Oblongata and Cerebellum
What are three forms of CAD?
- Stenotic
- Occlusive
- Dissecting Aneurysms
How does cervical rotation and extension affect the vertebral artery?
- It can cause Internal Carotid Artery Dissection.These movements compress the artery against the transverse process of the upper cervical vertebra
- Vertebral Artery Dissection is associated with contralateral cervical rotation that stretches or compresses the artery between the 1st two cervical vertebra
(I thought extension was one of the movements that the v-artery was mostly protected from)
Describe the 3 main symptoms (with details) of internal carotid artery dissection?
- Ipsilateral frontotemporal headache
- Usually reported in the frontotemporal or hemicranial regions
- Neck Pain (upper/mid cervical or anterolateral neck)
- 9-20 percent of symptomatic patients
- Facial pain (I think it was anterolateral too)
- 34-53 percent of pts
Describe the 2 main symptoms (with details) of vertebral artery dissection?
- Neck pain (34-46 percent of symptomatic pts)
- Usually sudden, severe, and sharp
- Ipsilateral
- upper posterior to middle c-spine
- Headaches sometimes accompany neck pain.
- Usually ipsilateral, constant ache in the occipital or parieto-occipital regions
**facial is not usually present
What are the classic symptoms of vertebral artery insufficiency? (5 counting 5D’s as 1)
- 5D’s (drop attacks, diplopia, dysphagia, dysarthria, dizziness)
- Ataxia
- Nausea
- Numbness of the unilateral face
- Nystagmus
** strict use of theses s/s may be misleading and lead to poor understanding of the pt’s presentation (I think lightheadedness and syncope is one also a s/s that could occur).
What factors raise the index of suspicion that a pt may have cervical arterial dysfunction (CAD)?
- Therapists should develop a high index of suspicion with acute onset of neck and head pain described as “unlike any other,” and consider the s/s associated with nonischemic and ischemic phases of CAD (cervical arterial dysfunction)