Lower Motor Neurons and Spinal Movement Flashcards
Glendinning
2 Sites of Sensory of Facial nerve (VII)
- Anterior 2/3 of tongue
- Touch behind ear
Type _____ fibers are fatiguable, with low mitochondira, high forces, and High ATPase
2
S3-S4 is Onuf’s nucleus, which innervates the _____ and the ______
Uretrhal and external anal sphincter (voluntary bathroom control)
The Biceps and Brachioradialis reflexes are innervated by _____ through _______
C5- C6
Triceps reflexes are controlled by the nerves _____ through _____
C7- C8
Sternocleido turns opposite side of head and lifts shoulder with Upper trapezius. Both of these are innerved by Cranial Nerve _____
Accessory Nerve (XI)
Sticking the tongue out tests cranial nerve _____
XII
(Tongue and Jaw follow lesion)
Type II afferent neurons are responsible for ______ ______
Sustained reflexes
Type _____ muscle fibers are Fatigue resistant, high mitochondria, with low forces, and low ATPase
1
Knee-jerk reflex tests the nerves ______ through _____ and the spinal cord
L3- L4
Werdnig Hoffman disease is the most common type of _____, with the key distinguishing presneation as “_____ ____”
- SMA
- Floppy Baby
Lower motor neuron myelination vs Post-ganglionic Autonomic myelination
- The lower motor has the highest myelination and diameter
- Post-Gang has virtually no myelination
Spinal Muscle Atrophy (SMA) is a group of progressive diseases caused by the degeneration of the _____ horns
Anterior
Lifting the eyebrows and Smiling tests ______ nerve
Facial (VII)
In regards to lower motor neurons, Motor neurons controlling axial muscles lie _____ to those controlling distal muscles
Medial
Gamma-motor neurons increase the _____ of the muscle spindle
Excitability
ALS differs from polio in that:
ALS affects both Lower and Upper motor neurons
C3-C5 are motor neurons going to the _____ nerve, which controls the diaphragm
Phrenic
The achillies reflex is controlled by the _____ nerve
S1
Weakness, hyporeflexia, Fibrillations and Fasciculations are distinguishing signs of ____ ____ ___ syndrome
Lower Motor Neuron
The 1a afferent neurons are responsible for ________
Dynamic Stretch reflexes
The polio virus attacks ____ horn motor neurons, causing ______ syndrome
- Ventral
- Lower Motor Neuron
The Gag reflex is sensed by _____ nerve; (easy mnemonic)
IX
(9GAG)
Alpha motor neurons determine _____ _____ type
Muscle fiber (all muscle fibers within a motor unit are the same type)
C1-C2 are the _____ _____, which are motor neurons to the trapezius and Sternocliedomastoid
Accessory nucleus
In regards to lower motor neurons, the Flexors lie _____ to the Extensors
Dorsal
“Dolphins always flexin’”
6 Cranial nerves with Lower motor neurons
- 5
- 7
- 9
- 10
- 11
- 12
ALS vs Polio
- ALS affects both UMN and LMN (alls the nerves get affected)
- Polio is just LMN
The Nucleus Ambiguus provides motor to CNs ____ and ____
IX and X
