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Divisions PNS (Brachial Plexus
C5 - T1 (Ulnar nerve (medial cord)
C7, 8…
Divisions PNS
Brachial Plexus
C5 - T1
Ulnar nerve (medial cord)
C7, 8, T1
SOUP: HALF OF RING FINGER, ULNAR SIDE
PRO: HALF OF RING FINGER ULNAR SIDE
Small muscles of hand, grip
Radial nerve (posterior cord)
C5, 6, 7, 8, 11
SOUP: HALF THUMB DOWN
PRO: RADIAL SIDE HALF MIDDLE FINGER MINUS FINGER TIPS
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Median nerve (medial cord)
C5, 6, 7, 8, 11
SOUP:HALF OF RING FINGER, RADIAL SIDE MINUS THENAR EMINENCE
PRO: FINGER TIPS RADIAL SIDE TO HALF RING FINGER
Anterior compartment forearm
Flexion + Pronation
LOAF:
- Lumbricals 1 + 2
- Opponens pollicis
- Abductor pollics brevis
- Flexor pollicis brevis
(OAF) = thenar eminence
Axillary nerve (posterior cord)
C5, 6
Muscultaneous nerve (lateral cord)
C5, 6, 7
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-
Brainstem
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Medulla
CN 9 - 12
Resp, cardiac, vasomotor + Autonomic centres
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-
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Nerve division and types
B
- Small diameter, myelinated, Mostly pre ganglionic autonmic fibres slow
C
Small diamter, unmyelinated, slow post ganglionic ANS + senosry/pain fibres
A
- Large diameter, myelinated , fastest fibres
- A- alpha: afferent or efferent: motor neuron
- fast and slow muscle fibres
- A-beta: afferent or efferent:
- motor neurone muscle spindles
- A delta: aff
- A gamma: eff
PNS
Nerve roots, spinal nerves, plexus + nerve
Motor
Anterior horn cell projections
From CNS to target cell: Efferent neurones (voluntary + involuntary)
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-
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- Dorsal root: sensory neurones: sensory info spinal cord
- Synapse with other neurone in spinal cord: sensory info to brain
- Ventral root:motor neurons
- Command from brainstem to ventral autonomic ganglion: synapse with efferent neurons: info to target tissue