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I wanna ask, like, अ, it is, अ, that कि हमारे पास जो, अ, functions of motor cortex होते हैं, उसके अंदर जो हमारे पास primary motor cortex होता है, वो simple movement करा रहा होता है। Premotor cortex हमारे पास, अ, help कर रहा होता है। मतल वो जब-- उसको हमेशा मतलब ऐसा होगा कि जब भी supplementary motor area काम कर रहा होगा तो primary motor area भी काम कर रहा होगा और, अ, premotor cortex तो करेगा ही करेगा। ठीक है? और मगर ऐसा हो सकता है कि premotor cortex काम कर रहा हो तो हमारे पास supplementary काम नहीं कर रहा हो। ऐसा हो सकता है, मगर ऐ Okay.

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Bilkul! Aapka question bahut important hai. Pehle aapki understanding ko clarify karte hain, phir textbooks se correct picture present karte hain.

Motor Cortex ke Teen Areas - Sahi Relationship

Motor cortex teen areas mein divide hota hai (Brodmann areas):

Area	Location	Brodmann
Primary Motor Cortex (M1)	Precentral gyrus	Area 4
Supplementary Motor Area (SMA)	Medial surface, longitudinal fissure	Area 6 (medial)
Premotor Cortex (PMA)	Lateral, anterior to M1	Area 6 (lateral)

Aapki Statement ki Correction

Aapne kaha: "Jab bhi SMA kaam karega to Primary aur Premotor dono kaam karenge - lekin Premotor akela kaam kar sakta hai SMA ke bina."

Yeh partially correct hai, lekin isko aur clearly samajhte hain:

Actual Hierarchy:

PLANNING STAGE         →         EXECUTION STAGE
SMA + Premotor Cortex  →  Primary Motor Cortex (M1)
(Area 6)               →  (Area 4)

Guyton & Hall ke mutabiq:

Primary Motor Cortex (M1): Sirf movement ka execution karta hai. Discrete, specific muscle movements generate karta hai.
Premotor Cortex: Complex patterns of movement plan karta hai. "Motor image" banata hai - matlab posture, orientation, coordination. Yeh apne signals directly M1 ko ya basal ganglia/thalamus ke through M1 ko bhejta hai.
SMA: Complex sequential movements program karta hai. Iska sabse important feature yeh hai ki yeh mental rehearsal ke time bhi active hota hai - bina actual movement ke bhi!

Sahi Relationship:

Simple, discrete movement (jaise ek finger hila) → Sirf M1 kafi hai
Externally guided, complex movement (koi bahar se cue mil raha ho) → Premotor cortex active hoga, phir M1 ko signal dega
Self-initiated, internally planned, sequential movement (jaise piano bajana bina dekhe) → SMA active hoga, jo M1 ko guide karega

Aapki Galti Kahan Thi:

Aap bol rahe the ki "SMA kaam kare toh Premotor zaroori kaam karega." Lekin yeh sahi nahi hai:

SMA aur Premotor cortex parallel/independent kaam karte hain - dono Area 6 ke hisse hain
SMA internally generated movements ke liye (bina external cue ke)
Premotor externally triggered movements ke liye
Dono M1 ko signal dete hain, lekin yeh ek-dusre ke dependent nahi hain
Dono M1 ko ZAROOR activate karte hain (kyunki actual movement tabhi hogi)

Simple Rule:

M1 = Always needed for actual movement (execution) SMA = Internal/self-planned movements (mental rehearsal bhi) Premotor = External cue-based complex movements SMA aur Premotor independent hain - dono M1 ke "boss" hain

Costanzo Physiology 7th Ed., p. 117 | Guyton & Hall Medical Physiology, Ch. 56

Koi aur specific point clear karna ho toh batao!

हाँ, तो इसका मतलब ये है कि भाई, जब भी कोई movement करानी होगी, तो सबसे पहले pre-motor cortex है, वो सबसे पहले तो हमारे पास इधर आएगा, क्या होता है यार, करेगा मसले को कि मैं ठीक है, मैं movement कर दूंगा। उसके बाद हमारे पास जो pre-primary motor cortex है, वो जो है, अ, जब supplementary motor area काम कर रहा होगा, तो हमारे पास primary motor area काम करेगा। कोई ना कोई काम करेगा। Yes, sir. Yeah.

Haan, bilkul sahi pakda! Lekin ek important exception yaad rakhna hai.

Aapki Understanding - Almost Correct!

Aap keh rahe ho:

"Jab bhi movement hogi → Premotor pehle decide karega → Phir Primary Motor execute karega. Aur jab SMA kaam karega, Primary Motor zaroori kaam karega."

Yeh 95% sahi hai. Sirf ek cheez add karo:

Complete Picture

CASE 1 - Externally triggered complex movement:
Premotor Cortex → M1 → Movement ✅

CASE 2 - Internally planned / sequential movement:
SMA → M1 → Movement ✅

CASE 3 - Simple discrete movement (reflex-like voluntary):
M1 directly → Movement ✅ (Premotor/SMA ki zaroorat nahi!)

Ek Important Exception - SMA ka Special Case

SMA ka sabse unique point yeh hai:

SMA active ho sakta hai bina kisi actual movement ke - jab aap sirf mentally rehearse karo movement ko (imagine karo ki haath hila rahe ho, bina hilaye).

Is case mein:

SMA = Active ✅
M1 = NOT active ❌ (kyunki actual movement ho hi nahi rahi)

Toh SMA → M1 ka rule actual movement ke time apply hota hai. Mental rehearsal mein SMA akela kaam kar sakta hai.

Final Rule Card

Situation	SMA	Premotor	M1
Simple movement	❌	❌	✅
Complex external cue	❌	✅	✅
Sequential self-planned	✅	❌/optional	✅
Mental rehearsal only	✅	❌	❌

Toh aapki baat sahi hai - jab actual movement hogi aur SMA involved hai, M1 zaroor kaam karega. Bas mental rehearsal wala exception yaad rakhna!

अ, अच्छा, ये तो मैं समझ आई है। Thank you so much. अच्छा, मुझे ख़ुदा की क्या बुरी इच्छा थी, एक और चीज़ मैं तुम्हें जो भी आती है, तुम्हें पता देती हूँ।

Haha, bilkul! Poochho jo bhi mann mein aaye - neuroscience ho, physiology ho, ya kuch aur. Main ready hoon! 😊

मुझे याद आ गया, वो जो था ना कि अन्य internal और external जो तुमने भी बोला ना कि moments आएगी इसमें तो इसलिए कि हम लोग ने समझ आया कि वो क्या था। बाकी सब मुझे समझ आ गया। आ रहा हूँ, आ रहा हूँ। सब ठीक है, thank you, thank you. और क्या? हम्म, ठीक है।

Bilkul! Sab samajh aa gaya - great! 😊

Jab bhi koi naya topic aaye ya koi cheez confuse kare, poochh lena. All the best padhai ke liye! 📚

I say कि मुझे याद आ गया कि question क्या मैं पूछी थी कि ये तुमने जो internal और external movements पूछी हैं कि planned और sequential ये सब तुमने क्या बोला था वो बताओ।

Haan! Maine pehle jo table banaya tha, usko aur detail mein samjhata hoon:

Internal vs External Movements - Full Explanation

🔵 External Movement (Externally Triggered)

Premotor Cortex (PMA) ka kaam

Bahar se koi cue/signal milta hai
Uske response mein movement hoti hai
Example: Doctor ne kaha "haath uthao" → aapne uthaya
Example: Traffic light green hui → gaadi chalayi
Example: Ball aa rahi hai → haath badhaya pakadne ke liye

Bahar ki duniya ne trigger kiya → Premotor active → M1 execute karta hai

🟠 Internal Movement (Internally Generated / Self-Initiated)

Supplementary Motor Area (SMA) ka kaam

Koi bahari cue nahi hoti
Apne andar se movement decide hoti hai
Sequentially planned hoti hai
Example: Khud se decide kiya "ab main uthke paani piunga"
Example: Piano bajana - ek ke baad ek notes apne aap se plan karke
Example: Mental rehearsal - bina hile sirf imagine karna movement ko

Andar se decision → SMA active → M1 execute karta hai

Simple Yaad Rakhne Ka Formula

	Externally Triggered	Internally Generated
Kya hota hai	Bahar se cue aata hai	Andar se decision aata hai
Kaun active	Premotor (PMA)	SMA
Special feature	Mirror neurons bhi yahan hain	Mental rehearsal mein bhi active
Dono mein common	M1 zaroori hai actual movement ke liye	M1 zaroori hai actual movement ke liye

Yahi tha jo maine pehle kaha tha! Clear hua? 😊

thanks bro it means alot

Anytime! 😊 Khush raho, aur padhai mein bahut aage jao! 🙌

Jab bhi koi doubt aaye - neuro ho ya kuch bhi - poochh lena. All the best! 💪

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