Neuroanatomy 3- Spinal cord Flashcards
82 year old female with chronic low back pain radiating to both legs. Pain is relieved when she leans forward or rests.
What is the abnormality and what could be the underlying cause?
L4/L5 Disc herniation and compression of the spinal nerves
The ____ _____and brainstem are supplied by the _______-_______ ______. The _______ is supplied by both the vertebral-basilar system and ______ _______ system.
The spinal cord and brainstem are supplied by the vertebral-basilar system. The cortex is supplied by both the vertebral-basilar system and internal carotid system.
All along the spinal cord you can find ____ anterior spinal artery and____ posterior spinal arteries.
All along the spinal cord you can find one anterior spinal artery and two posterior spinal arteries.
What space is highlighted
Epidural Space
What space is highlighted?
Subarachnoid space
What is the Filum Terminale made of and what is its function
Extension of the pia and supporting cells and it attaches to the caudal end of the spinal cord to coccyx
What is in the white mater
Ascending and descending tracts
Where are the sympathetic neurons located?
In the lateral horn of spinal cord T1-L2
Where are the parasympathetic neurons located
CN 3,7,9,10 in the brainstem and in the lateral horn of S2,3,4
Green: substantia gelatinosa
Blue: Lissaur’s tract
which part of the spinal cord has the most white matter
Cervical
What type fo motor neurons are in the Lateral grey horn
Which part of the spinal cord has the most grey matter
Sacral spine
1) Fibres carrying Pain and temp information enter in the ______. _______
2) Fibers travel up and down _______ _______
3) The first synapses occur in the ______ _______ of the posterior horn
4) These 2nd order neurons now cross the midline in the _____ ___ ______ and ascend inthe spinothalamic tract
1) Fibres carrying Pain and temp information enter in the posterior horn
2) Fibers travel up and down Lissauer’s tract
3) The first synapses occur in the substantia gelatinosa of the posterior horn
4) These 2nd order neurons now cross the midline in the Anterior white commissure and ascend inthe spinothalamic tract
What is the purple
Anterior white commissure
Where is this section from?
Ligth blue: Nucleus Cuneatus
Dark blue: Fasciculus Cuneatus
Light blue: Nucleus Gracilis
Dark Blue: Fasciculus Gracilis
Yellow: Spinothalamic Tract
Pink: SPINOCEREBELLAR TRACT
What is this a slice of
Yellow : Spinothalamic tract
Pink: spinal cerebellar tract
Orange: lateral Corticospinal tract
Blue Fasciculus cuneatus
Blue: Faciculus Gracillis
Orange: Anterior cortico spinal tract
Orange: Pyramid
Red” internal arcuate fibers
What is this
Superior medulla
Yellow: Spinothalamic tract
Purple: medial lemniscus
Brown/Grey: medial longitudinal fasciculus
Pink: Spinocerebellar tract
Orange: Pyramid
What is this a slice of?
Purple: medial lemniscus
Brown/Grey: medial longitudinal fasciculus
Orange: Corticospinal fibers
What is this a slice of
Yellow: Spinothalamic tract
Purple: medial lemniscus
Brown/Grey: medial longitudinal fasciculus
What is the function of the lateral corticospinal tract?
Skilled movement of the extremities
What is the function of the anterior corticospinal tract
Postural adjustment and help stablize the body with muscles of the trunk
What is the blood supply of the anterior cortical spinal tract
THe anterior spinal artery
What is the blood supply of the lateral corticospinal tract?
Posterior spinal arteris and the anterior spinal artery
Where does the corticospinal tract originate from?
The motor cortex
Where does the corticospianl tract decussate
85% of the fibers decussate in the medulla at the decussation of the pyramids and from the lateral(crossed 85% )and anterior corticospinal tract (15% uncrossed)
Where does the fibres of the anterior corticospinal tract cross
THey cross at the midline in the spinal cord where they terminate at LMN
Descending fibres of the corticospinal tract fROm the _____ _____ and converge to pass through the _______ ________of the ______ ______
Descending fibres of the corticospinal tract form the Corona Radiata and converge to pass through the posterior limb of the internal capsule
Contralaterla hemiparesis
what is the function posterior column medial lemniscus pathway
Discriminative touch
pressure
vibration
proprioception
What spinal tracts are found in the fasciculus gracilis (somatotopic organization)
The sacral and lumbar regions of the spinal cord
What is the blood supply of the Posterior column medial lemniscus pathway?
The posterior spinal arteries
Secondary neurons of the posterior column-medial lemniscus pathway cross the midline as _____ _____
Secondary neurons of the posterior column-medial lemniscus pathway cross the midline as Arcuate fibres
What type if innervation does the internal urethral sphincter have?
Sympathetic
What type if innervation does theDetrusor muscle have?
Parasympathetic S12,3,4
- What type if innervation does the External urethral sphincter have?
Somatic
What centre in the pons coordinates the action of voiding?
Pontine micturition centre
At rest/bladder filling the Pontine micturition centre _____ neurons with ________ actions and activates neurons with ________ innervation
At rest/bladder filling the Pontine micturition centre inhibits neurons with parasympathetic actions and activates neurons with Sypmathetic innervation
Spastic bladder results from a lesion ______ T12
Spastic bladder results from a lesion above T12
Flaccid bladder occurs a lesion _____ T12
Flaccid bladder occurs a lesion BELOW T12
