All are true about spinal cord except :–

Options

A. Epidural space around meninges is present
B. Pseudounipolar neurons in ventral root
C. Sensory fibre in dorsal root and motor fibre in ventral root
D. Lateral horn related to ANS

Answer

To solve the question "All are true about spinal cord except:", we need to evaluate each option provided and identify which statement is incorrect. Here’s a step-by-step breakdown:

### Step 1: Understand the Structure of the Spinal Cord
The spinal cord is surrounded by protective layers called meninges, which include three spaces: the epidural space, the subarachnoid space, and the subdural space. Each of these spaces contains important blood vessels.

**Hint:** Remember the names and functions of the spaces surrounding the spinal cord.

### Step 2: Evaluate the First Option
The first option states that "the epidural space around the meninges is present." This is true as the epidural space is indeed a part of the protective layers surrounding the spinal cord.

**Hint:** Confirm the presence of the epidural space in the anatomy of the spinal cord.

### Step 3: Evaluate the Second Option
The second option claims that "pseudo unipolar neurons are in the ventral root." This statement is incorrect because pseudo unipolar neurons are located in the dorsal root ganglion, not the ventral root.

**Hint:** Recall the location of pseudo unipolar neurons and their association with sensory and motor functions.

### Step 4: Evaluate the Third Option
The third option states that "sensory fibers are in the dorsal root and motor fibers are in the ventral root." This is accurate as the dorsal root carries sensory information to the spinal cord, while the ventral root carries motor information away from the spinal cord.

**Hint:** Differentiate between sensory and motor fibers and their respective roots.

### Step 5: Evaluate the Fourth Option
The fourth option mentions that "the first cervical nerve may lack the dorsal root." This is also true, as some anatomical variations can lead to the absence of a dorsal root in the first cervical nerve.

**Hint:** Understand the variations in spinal nerve anatomy, particularly in the cervical region.

### Conclusion
After evaluating all the options, the incorrect statement is the second option regarding pseudo unipolar neurons being in the ventral root.

**Final Answer:** The incorrect statement is: "pseudo unipolar neurons in the ventral root."