Cheeky neuroanatomy Flashcards
What does the insular lobe (or insula) do?
The insula has an important role to play in the patient’s experience of pain
What is special about the spinal segments T1-L2
They have lateral horns –> these contain the preganglionic sympathetic neurones
What does the epidural space contain?
Adipose tissue
Anterior and posterior epidural venus plexuses
Input from the tectospinal tract is mostly to where?
Input is mostly to cervical segments
What do they think the function of the tectospinal tract is?
Thought to mediate reflex head and neck movement due to visual stimuli
This tract forms the central core of the brainstem
- where do fibres originate from?
- input to this formation?
Reticulospinal tract
- fibres originate from pons and medulla
- it has many nuclei and receives input from virtually all parts of the CNS
Functions of the reticulospinal tract
The reticulospinal tract has many functions, including the influencing of voluntary movement
Fibres in the pons and their effect on extensor/flexor movements?
Fibres originating in the pons:
facilitate extensor movements
and
inhibit flexor movements
Fibres originating in the medulla and their effect on extensor/flexor movements?
Inhibit extensor movements
Facilitate flexor movments
Where do inputs to the vestibulospinal tract originate from?
Fibres originate in the vestibular nuclei of the pons and the medulla
Brown-sequard syndrome
- ipsilateral paralysis
- ipsilateral hyperreflexia &extensor plantar reflex
- ipsilateral loss of vibratory sense and proprioception; contralateral loss of pain and temperature sense
Where do the fibres from the corticospinal tract cross?
- 85% cross at the medulla (these then form lateral corticospinal tract)
- the other 15% then cross segmentally (ventral corticospinal tract)
