Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
36 Cards in this Set
- Front
- Back
|
The primary spinal cord long tracts
|
Corticospinal tracts
Dorsal column-medial lemniscal system Anterolateral system Spinocerebellar tracts |
|
|
the major source of volitional motor control in humans.
|
Pyramidal system
|
|
|
The primary function of the corticospinal tract.
|
Control of fine skilled movements in the extremities.
|
|
|
The rubrospinal tract appears to control
|
Flexor activity in arm and forearm
|
|
|
The primary functions of the Dorsal column-medial lemniscal system
|
discriminative (epicritic) touch
vibration sense proprioception |
|
|
The primary functions of the anterolateral system.
|
pain
temperature crude (protopathic) touch |
|
|
Primary function of the spinocerebellar tracts
|
unconscious proprioception
information from muscle (spindles and golgi tendon organs) conveyed to the cerebellum (also some exteroceptive input). |
|
|
The cortical neurons of the pyramidal tract are called ___________
|
Upper motor neurons
|
|
|
Spinal cord and brainstem motor neurons that directly innervate muscle are called _________
|
Lower motor neurons
|
|
|
Most of the pyramidal axons that do not cross form the _______
|
anterior corticospinal tract (ACST)
|
|
|
Generally, corticospinal axons are _________ to flexors and _______ to extensors.
|
Excitatory
Inhibitory |
|
|
In general, the areas of the corticospinal tract carrying axons that will invervate leg areas will be ________ to those that innervate areas to the trunk or arm.
|
Lateral
|
|
|
The extensor biased descending systems.
|
Vestibulospinal tract
Reticulospinal tract |
|
|
The reticulospinal tracts originate where?
|
Nuclei in the brainstem
|
|
|
Where do the reticulospinal tracts travel?
|
Ventral and ventral lateral funiculus
|
|
|
The primary input of the vestibular nuclei
|
Vestibular apparatus
Cerebellum |
|
|
The primary ascending divisions
|
dorsal columns
anterolateral system spinocerebellar tracts |
|
|
Axon types of the dorsal column
|
Ia
Ib II A-beta |
|
|
The primary subdivisions of the dorsal column
|
fasciculus gracilis
fasciculus cuneatus |
|
|
Fasciculus gracilis and fasciculus are separated by:
|
the posterior intermediate sulcus
|
|
|
Fasciculus gracilis consists of axons for DRG neurons below what spinal level?
|
T6
|
|
|
Within the dorsal column, afferents from the leg and foot are located ________ while the arm and neck are located _______.
|
Medially
Laterally |
|
|
Where do dorsal column axons synapse?
|
Nuculeus gracilis/cuneatus
|
|
|
Axons from nucleus gracilis and cuneatus form:
|
the medial lemniscus
|
|
|
Where is the medial lemniscus formed?
|
Level of the obex (medulla)
|
|
|
Types of axons within the anterolateral system
|
III
IV A-delta C |
|
|
Where do axons of the anterolateral system enter the spinal cord?
|
lateral division of the dorsal root entry zone
|
|
|
Axons of the anterolateral system synapse mostly in:
|
Lamina I-V of the dorsal horn
|
|
|
Sensory information in the spinocerebellar tract is conducted through the DRG to cell nuclei located where?
|
Intermediate zone of the spinal grey matter then to cerebellum
|
|
|
The three major divisions of the spinocerebellar tracts
|
Anterior/Posterior spinocerebellar tracts
Cuneocerebellar tract |
|
|
The anterior/posterior spinocerebellar tracts carry sensory information from where?
|
Lower limb
|
|
|
The cuneocerebellar tract carries sensory information from where?
|
Upper limb
|
|
|
Which spinocerebellar tracts ascend to the cerebellum ipislaterally and carry information from individual muscles?
|
Posterior
Cuneocerebellar |
|
|
The dorsal columns are supplied with blood primarily by:
|
posterior spinal artery
|
|
|
Medial regions of white matter are supplied by:
|
Anterior spinal artery
|
|
|
Lateral regions of white matter around the border of the spinal cord are supplied by:
|
posterior spinal artery
arterial vasocorona |
