Neuroanatomy Lecture II

Between T1 and L2 the vertebral grey matter contains 'lateral horns'. What is contained within these lateral horns?

Match the definitions to the term they describe. [blank_start]Ganglion[blank_end] A group of nervous cells residing outwith the central nervous system [blank_start]Nucleus[blank_end] A group of nervous cells residing within the central nervous system

There are three major longitudinal arteries that supply the spinal cord: The 2 [blank_start]Posterior Spinal[blank_end] Arteries and the 1 [blank_start]Anterior Spinal[blank_end] Artery.

Unlike the dura in the cranial cavity, the dura in the spinal canal is not directly in contact with the bone. This space is called the [blank_start]Epidural[blank_end] space and is useful for anaesthesia.

Within the epidural space run a network of venous plexuses to drain the blood from the spinal cord. These are called [blank_start]Epidural[blank_end] venous plexuses.

Label the below diagram

The main sensory system responsible for fine touch and proprioception sensations is called the ...

In terms of the dorsal column/medial lemniscus system, sensory nerve impulses first enter the spinal cord via the [blank_start]dorsal[blank_end] root (dorsal or ventral?) before synapsing in the [blank_start]Medulla[blank_end], from which they then travel up into the brain, synapsing again in the [blank_start]Thalamus[blank_end] before finishing their journey at the [blank_start]Somatosensory[blank_end] Cortex

The [blank_start]Spinothalamic[blank_end] Tract is responsible for the sensory aspect of the pain sensation

The [blank_start]Corticospinal[blank_end] Tract is the main Motor Pathway allowing fine and precise movements.

An Upper Motor Neuron lesion is classed as a lesion anywhere between the [blank_start]Cortex[blank_end] and the [blank_start]Anterior Horn of vertebral grey matter[blank_end].

The Corticospinal Tract is also known as the [blank_start]Pyramidal[blank_end] Tract

The decussation of the pyramids refers to the point at which around 85% of the fibres of the corticospinal tract cross from one side to the other. This occurs in the [blank_start]Medulla[blank_end].

Name the white matter tract used by the Corticospinal Tract to pass neurons from the Primary Motor Cortex into the Midbrain The [blank_start]Internal Capsule[blank_end]

Match each aspect of the extra-pyramidal system to its definition. [blank_start]Tectospinal Tract[blank_end] Mostly serves the cervical area, mediating head and neck reflex movements in response to visual and auditory stimuli [blank_start]Reticulospinal Tract[blank_end] Forms the central core of the brainstem, has many nuclei and receives input from virtually all parts of the CNS [blank_start]Vestibulospinal Tract[blank_end] Maintains head and eye coordination, upright posture and balance.

Which Corticospinal tract crosses over in the medulla at the decussation of the pyramids?

In terms of the spinal cord itself, what fibrous structure is the yellow arrow on the diagram pointing to? [blank_start]Filum Terminale[blank_end]

The [blank_start]Denticulate[blank_end] Ligaments are extensions of the pia mater over the spinal cord which holds the spinal cord in place, by connecting the pia mater to the arachnoid & dura maters.