The spinal cord has both ventral and dorsal horns. The dorsal horns contain afferent neurons that receive sensory input from the environment, while the ventral horns contain efferent motor neurons that send impulses to the effector.

Nerves are separate structures that branch out from the spinal cord and central nervous system into the periphery. Cerebrospinal fluid surrounds the components of the central nervous system and acts to protect the brain and spinal cord, as well as regulate the environment of the central nervous system.

The dorsal column medial lemniscal pathway is the sensory pathway of the neural system that transports vibration, proprioception, two-point discrimmination, and fine touch.

The lateral spinothalamic pathway is the sensory pathway that transports pain and temperature sensation.

The corticospinal pathway is the motor control pathway that travels from the brain—specifically the precentral gyrus—to the spinal cord.

The corticobulbar pathway is the motor control pathway that travels from the brain, to the brainstem and the cranial nerves.

The anterior spinothalamic pathway is sensory pathway for crude touch and pressure.

The correct order of CSF flow is as follows:

Lateral ventricals, foramen of Monro, third ventricle, cerebrel aqueduct of Sylvius, fourth ventricle, foramen of Magendie (medial) and foramen of Lushka (lateral), central canal and subarachnoid space, superior sagittal sinus

The lateral spinothalamic tract is a sensory tract that conveys pain and temperature information. Although the tectospinal tract is a motor tract, it coordinates reflexive head movements in response to visual stimuli. The rubrospinal tract is also a motor tract, but it regulates activity of the upper extremity flexors. The fasciculus gracilis is a sensory tract carries proprioception, vibration, and light touch information, from the lower extremities.

The spinal cord consists of 31 segments/pairs. The cervical contains 8, thoracic contains 12, lumbar contains 5, sacral contains 5, and coccygeal contains 1. 

The dorsal column track is an ascending system conveying somatic sensory information to the brain. The dorsal column tracts ascend in the fasiculus gracilis and fasiculus cuneatus. They synapse in the medulla so that signals from the left side of the body are transmitted to the right side, and vice versa. 

Preganglionic neurons of the parasympathetic nervous system originate in the nuclei of the craniosacral region (cranial nerves and in the spinal cord segments of S2-S4). Those of the sympathetic nervous system originate in the thoracolumbar region (spinal cord segments of T1-L3).   

The anterior roots are where outgoing instructions leave the spinal cord. The posterior roots are where incoming sensory information enter the spinal cord. Grey matter contains the cell bodies of neurons, while the white matter contains the axons of nerves. 

A delta fibers are responsible for signaling "new" sharp pain. The body sends this sensory information to Rexed Laminae I and II. *I and II are called the substantia gelatinosa.

Fasciculus gracilus is one of the component to the dorsal columns. Remember that anything that is dorsal of the spinal cord is associated with sensation. In addition, the dorsal columns control touch while the spinothalamic tract carries pain and temperature information.