Chart 7-13 · 14 min
Spindle cells
A read of this page, with the plate.
A muscle spindle sits in the belly, in parallel with the fibers that do the work. She called it a spindle cell. Intrafusal fibers plus sensory endings is the line that stands. When the muscle is stretched, the spindle is stretched. The sensory receptor — Ia, in the literature — signals the cord. Alpha motor neurons fire the surrounding extrafusal fibers. They take the load. The spindle can quiet. Stretch reflex. Myotatic. Spinal. Fast.
Where the next board sits
The drawing is literacy so gamma-on has somewhere to sit. Golgi is a different organ, in series at the musculotendinous junction — tension, not length. Autogenic inhibition is the Golgi reflex: high tension in series at the tendon tells the same muscle to let go. It belongs on this plate as a contrast, not as a treatment. You name parallel. You name stretch. You name the quiet after the extrafusal take the load.
Practice
Open the lab. Rest. Then stretch. Watch extrafusal take the load. Journal where in your own body a stretch-reflex already lives — a knee, a jaw, a neck — as sensation.
Check
A muscle spindle, in the line that stands, sits:
- In parallel with extrafusal fibers — intrafusal plus sensory endings — and fires when lengthened ✓
- In series with the tendon only, as a Golgi story
- In the vesicle with germanium
Parallel. Stretch. Reflex. Golgi is a different organ — in series, tension — on this plate as a contrast, not this reflex.
After extrafusal fibers contract in the stretch reflex, the spindle:
- Can quiet — the extrafusal have taken the load. That is her ‘then the spindle can relax’ ✓
- Must stay shouting or the length-map has failed
- Releases acetylcholine into the cleft
Load shared. Spindle quiets. ACh is the plate, not the spindle.
Spindle in parallel on this hour:
- Thyroxine from the medulla
- Length and rate ✓
- Collapsing two houses into one word
Spindle in parallel — Length and rate
Spindle cells — keep this:
- A rigid medical diagnosis you must stamp
- When the muscle is stretched, the spindle is stretched. ✓
- A board you invent without her permission
When the muscle is stretched, the spindle is stretched.
This hour teaches that:
- A bottle that finishes the feeling
- Autogenic inhibition is the Golgi reflex: high tension in series at the tendon tells the… ✓
- A reason to skip permission
Autogenic inhibition is the Golgi reflex: high tension in series at the tendon tells the same muscle to let…
Practice on this hour is to:
- A replacement for the physician
- Watch extrafusal take the load. ✓
- A tourist empty-mind contest
Method before bottle. Trace what the lesson names.
Chart 7-13 on this hour is used as:
- Proof of supernatural status
- Spindle in the belly. Stretch. Sensory to the cord. Motor back. Extrafusal take the… ✓
- Treating every hour as interchangeable production
Translator map — Chart 7-13. Not a prescription pad.
The lab on this hour is for:
- A graded exam that invents the next curriculum
- Feeling and naming what the lesson maps — journal, not a bottle ✓
- A prescription pad for the lab name
Lab is literacy. Not a dose from the yield.
"Spindle cells" here is best treated as:
- A tourist collection of special experiences
- A muscle spindle sits in the belly, in parallel with the fibers that do the work. ✓
- A rigid diagnosis tool that replaces sleep
Train with the map. Do not invent a second sky.
A common mistake this hour corrects:
- Living against the tide on purpose
- Golgi is a different organ, in series at the musculotendinous junction — tension, not… ✓
- Squeezing the gate until it 'opens'
Golgi is a different organ, in series at the musculotendinous junction — tension, not length.