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Questions and Answers
Which region of the spinal cord has spinal nerves found above the corresponding vertebrae?
Which region of the spinal cord has spinal nerves found above the corresponding vertebrae?
- Sacral region
- Thoracic region
- Lumbar region
- Cervical region (correct)
What does myotome refer to?
What does myotome refer to?
- Muscles innervated by axons from a single spinal segment (correct)
- Area of the skin innervated by the axon from a single segment
- Region of the spinal cord with specific nerve connections
- Peripheral nerve field muscle
Where are remaining spinal nerves found, except the C8 spinal nerve?
Where are remaining spinal nerves found, except the C8 spinal nerve?
- Below the corresponding vertebrae (correct)
- Above the corresponding vertebrae
- In the thoracic region
- In the lumbar region
What does dermatome refer to?
What does dermatome refer to?
What is the peripheral nerve field?
What is the peripheral nerve field?
What does a myotome specifically innervate?
What does a myotome specifically innervate?
What is the significance of the C8 spinal nerve?
What is the significance of the C8 spinal nerve?
Which term refers to the region of the skin innervated by the axon from a single segment?
Which term refers to the region of the skin innervated by the axon from a single segment?
What is the role of the peripheral nerve field?
What is the role of the peripheral nerve field?
Which myotome is responsible for ankle dorsiflexion?
Which myotome is responsible for ankle dorsiflexion?
Which level is associated with innervation of the trapezius and sternocleidomastoid muscles?
Which level is associated with innervation of the trapezius and sternocleidomastoid muscles?
Which classification of incomplete spinal cord injury is associated with damage to the anterior cord?
Which classification of incomplete spinal cord injury is associated with damage to the anterior cord?
What is the classification of spinal cord injury characterized by significant impactful trauma?
What is the classification of spinal cord injury characterized by significant impactful trauma?
Which myotome is responsible for wrist extensors?
Which myotome is responsible for wrist extensors?
What is the male to female ratio for new cases of traumatic spinal cord injury in Australia?
What is the male to female ratio for new cases of traumatic spinal cord injury in Australia?
Which myotome is responsible for elbow extensors?
Which myotome is responsible for elbow extensors?
Which myotome is responsible for knee extensors?
Which myotome is responsible for knee extensors?
Which classification of incomplete spinal cord injury is associated with damage to the central cord?
Which classification of incomplete spinal cord injury is associated with damage to the central cord?
What is the classification of spinal cord injury characterized by paralysis of all four limbs?
What is the classification of spinal cord injury characterized by paralysis of all four limbs?
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Study Notes
Spinal Nerve and Vertebra Relationship
- Spinal nerves above corresponding vertebrae are found in the cervical region.
- Remaining spinal nerves, except for C8, are located below their corresponding vertebrae.
Myotome and Dermatomes
- Myotome refers to a group of muscles innervated by a single spinal nerve root.
- Dermatomes are regions of skin innervated by the sensory fibers of a single spinal nerve root.
- C8 spinal nerve has a unique significance, as it represents the transition point between cervical and thoracic spinal nerves.
Peripheral Nerve Fields
- The peripheral nerve field refers to an area of skin that a single peripheral nerve innervates, typically representing multiple spinal nerve segments.
- The role of the peripheral nerve field is to provide a mixed sensory and motor function to a region.
Myotome Responsibilities
- Ankle dorsiflexion is primarily controlled by the L4 myotome.
- The C2 dermatomes are associated with the innervation of the trapezius and sternocleidomastoid muscles.
- Wrist extensors are mainly innervated by the C6 myotome.
- Elbow extensors correspond with the C7 myotome.
- Knee extensors are governed by the L3 myotome.
Spinal Cord Injury Classifications
- Anterior cord syndrome indicates damage to the anterior part of the spinal cord and is classified as an incomplete spinal cord injury.
- A complete spinal cord injury classification characterizes paralysis of all four limbs (quadriplegia).
- Central cord syndrome is associated with damage to the central region of the spinal cord.
Traumatic Spinal Cord Injury Demographics
- The male to female ratio for new cases of traumatic spinal cord injury in Australia is approximately 4:1.
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