Transcript Lab plan - Georgia Institute of Technology

Lab plan
• Apparatus
• Activation properties
– Amplitude, frequency
• Mechanical properties
– Length, velocity
Load cell
• Strain gage
– R=r l/a
– Proportional to length, inverse to area
• Load cell
– Deform under specific load
– Wheatstone bridge
• R1 & R2 on opposing faces
R1
Vi
R3
Vo
R2
R4
Anatomy
Rostral
Dorsal
Caudal
Ventral
Medial
Lateral
Anatomy
• Muscles
–
–
–
–
Gasctrocnemius
Anterior tibialis
Vasti
Hamstrings
• Nerve
– Sciatic/femoral
Stimulation
Stimulus voltage
• Pulse
– Width
– Frequency
• Train
Stimulus voltage
– Duration
– Rate
1.0
0.8
0.6
0.4
0.2
0
0
1
2
3
Time (ms)
4
5
1000
1200
1.0
0.8
0.6
0.4
0.2
00
200
400
600
800
Time (ms)
Force
• Twitch
– Time to peak tension
– Relaxation time
• Tetanus
– TtPT
– RT
– Sag
Things to watch for
• Muscle
– Damage
– Length
• Nerve
– Damage
– Desiccation
• Compliance
– Tendon, Suture
– Limb, force transducer motion