section 4 part 3 Flashcards
what type of sensory info does the dorsal column carry?
epicritic
what is another name for the dorsal column tract?
medial lemniscal system
where does axons from the anterolateral system cross?
in the anterior white commissure
what 3 tracts make up the anterolateral system?
- spinoreticular
- spinotectal
- spinothalamic
does the anterolateral system travel contra or ipsilateral?
contralateral
does the dorsal column system travel contra or ipsilateral?
ipsilateral
what does the term “dissociated sensory loss” mean?
pain & temp loss on one side of the body and fine discrimination abilities (epicritic) loss on the other side
which tract does this sentence describe?
“regulates movement & does NOT normally contribute to our conscious perception of limb position”
spinocerebellar
what structure does the dorsal cerebellar tract travel through to get to the cerebellum?
the inferior puduncle
where do axons from the cunate fasiculus terminate in?
in the medulla on the accessory cuneate nucleus
how does the cuneocerebellar tract (axons from the cuneate fasiculus) get to the cerebellum?
via the inferior puduncle
how do the axons of the anterior spinocerebellar tract enter the cerebellum?
via the superior puduncle
list the symptoms associated with a cerebellar lesion
muscle incoordination
ataxia
intentional tremor on SAME side of body
equilibrium & balance problems
which pyramidal tract does motor control of distal muscles?
lateral corticospinal tract
which pyramidal tract does motor control of proximal & axial limb musculature?
the ventral/anterior corticospinal tract
which brainstem tract does distal motor control?
rubrospinal tract
which brainstem tract does predominantly proximal motor control?
the medial brainstem pathways
what 3 tracts make up the medial brainstem pathway
- vesibularspinal
- tectospinal
- reticulospinal
what type of neurons does the hypothalamo-reticulospinal pathway consist of?
preganglionic sympathetic neurons
at what spinal levels does the hypothalamo-reticulospinal exist?
C8-L3
damage in what areas and to which tract results in Horners?
the hypothalamo-reticulospinal tract anywhere between the hypothalamus and T1
which spinal root mediates arm abduction, flexion & rotation at the shoulder?
C5
which 2 spinal roots mediates flexion at the elbow and the biceps reflex?
C5 and C6
which spinal root mediates wrist extension?
C6
which spinal root mediates elbow extension and triceps reflex?
C7
which spinal root mediates leg extension at the knee & the patellar tendon reflex?
L4
which spinal root mediates dorsiflexion at the ankle? tibialis anterior, extensor digitorum
L5
which spinal root mediates plantar flexion at the ankle and the achilles tendon reflex?
plantar flexion- gastroscnemius, soelus, plantaris
S1
which spinal root is the culprit in Erb’s palsy?
C5
which spinal root is responsible for flexion of the digits?
C8
which spinal root is responsible for abd and add of the digits?
interossei & lumbrical muscles
T1
which 2 spinal roots does hip flexion?
L1 and L2
which 2 spinal roots do extension of the knee (quad) and add of the hip?
L2 and L3
which spinal root is responsible for inversion of the foot?
L4
which spinal root is responsible for hip ABD (glut med & min)?
L5
which spinal root does knee flexion (hamstrings) and foot eversion (fibularis)?
S1
