This is part of a series of patterns I'm gradually releasing that form an anatomically correct human brain. I have already released the pattern for the brainstem/cerebellum.
The corpus collosum is a fibrous band that connects the 2 brain hemispheres together. The ventricles house the cerebral spinal fluid.
Difficulty:
Medium
You will need:
- A 2mm crochet hook
- A 1mm crochet hook
- Rico essentials crochet cotton in blue
- Anchor creativa fino cotton in white
- Polyester toy stuffing
For the ventricles:
Use blue cotton and a 1mm hook throughout
Use blue cotton and a 1mm hook throughout
For the right ventricle:
Ch5
Round 1: sc in the 2nd chain st from hook and the next 2 chain sts. Make 3sc in the back of the first chain st you made, then sc in the back loop of the previous 2 chain sts you crocheted into. Make 2sc in the back of the first chain st you crocheted into (10sc)
Round 2: Sc4, make 2sc in the next st, sc5 (11sc)Round 3: Sc4, make 2sc in the next st, sc6Round 4: (Over 1 round) sc11, sc2togRound 5: Sc in each stRound 6: Slip1, sc2, hdc4, sc2, slip2Round 7: Sc in each stRound 8: Slip2, sc2, hdc3, sc2, slip2Rounds 9 - 13: (5 rounds) Sc in each stRound 14: Slip3, sc2, hdc3, sc2, slip1Rounds 15 - 21: (7 rounds) Sc in each stRound 22: (Over 1 round) Sc2, make 2sc in the next st, sc, hdc3, sc, 2sc, sc, s2togRound 23: Slip1, sc3, hdc3, sc3, slip2Rounds 24 - 25: (2 rounds) Sc, slip4, sc2, hdc4, scRound 26: (Over 1 round) sc5, sc2tog, sc4, sc2togRounds 27 - 30: (4 rounds) Sc in each stRow 31: Sc6. Ch1, turnRow 32: Hdc, bfsc2, slip3, bfsc2, hdc. ch1 turnRow 33: Hdc, sc2, slip3, sc2, hdc. ch1, turnRow 34: Hdc, bfsc2, slip3, bfsc2, hdc. ch1, turnRow 35: Sc in each stRound 36: Sc in the first st of last round, then sc in the next 8sts to form a round (9sc)Round 37: Sc in each stRound 38: Sc4, sc2tog, sc3 (8sc)Round 39: Hdc2, sc2, slip2, sc2Rounds 40 - 41: (3 rounds) Sc in each stRound 42: Sc5, sc2tog, scRounds 43 - 49: (7 rounds) Sc in each stRound 50: Slip3, sc2, make 2hdc in the next st, sc (9sts)Round 51: Sc2, make 2sc in the next st, sc5Rounds 52 - 54: (3 rounds) Sc in each stRound 55: Sc7, sc2tog (8sc)Round 56: (Over 1 round) Sc3, sc2tog, sc2, sc2tog (6sc)Round 57: Sc4, sc2tog (5sc)Fasten offRejoin yarn to round 30 to the stitch you haven't crocheted into yet, as shown below
Round 31: Sc in this st, then sc10 around the inside of the hole made by the subsequent rows (11sc)
Round 32: Sc in each stRound 33: Sc5, sc2tog, sc4 (10sc)Round 34: Sc in each stRound 35: Sc4, sc2tog, sc4 (9sc)Round 36: Sc4, sc2tog, sc3 (8sc)Round 37: Sc2tog, sc6 (7sc)Round 38: Sc, sc2tog, sc, sc2tog, sc (5sc)
For the left ventricle:
ch5
Round 3: Sc in this st and the next 4stsRound 4: (Note that this is slightly more than 1 round) sc2, make 2sc in the next st, sc, sc2tog (5sc)Round 5: Sc4, make 2sc in the last st (6sc)Round 6: Sc, make 2sc in the next st, sc2, ch3. Sc in the 2nd st after the new you created when fastening off previously. Sc in the next 4sts of this section, ch3, skip 1 st on the other section then sc in the next st
Round 7: Sc in each stRound 8: Sc2, make 2sc in the next st, sc14 (15sc)Round 9: Sc in each st
Round 10: Sc in this st, skip2, sc in the next st, ch1Round 10: Sc in the first st of last round, hdcFasten offSew in all loose ends and sew closed any openings (like where you made the ch3 across the gap and the remaining sts you didn't crochet into on round 9)For the intraventical foramen (make 2):Ch3Row 1: sc in the 2nd chain st from hook and the next st. ch1, turn (2sc)Row 2: Sc in both stsFasten offSew one edge of each of these sections to the top of the 3rd/4th ventricles. Sew the opposite end to approximately row 11 on the left/right ventricle sections (see below)
That's all from this pattern - I hope you've enjoyed it! If you have any questions please feel free to email them to me at lhodginscrochet@gmail.com. You can also contact me on my Instagram, which you can follow to be kept up to date with what I'm working on.
Fasten off
For the left ventricle:
ch5
Round 1: sc in the 2nd chain st from hook and the next 2 chain sts. Make 3sc in the first chain st you made, then sc in the back of the previous 2 sts you crocheted into. Make 2sc in the back fo the first chain st you crocheted into (10sc)Round 2: Sc4, make 2sc in the next st, sc5 (11sc)Round 3: Sc4, make 2sc in the next st, sc6 (12sc)Round 4: (This is slighlty over 1 round) sc11, sc2tog (11sc)Round 5: Sc in each stRound 6: Slip1, sc2, hdc4, sc2, slip2Round 7: Sc in each stRound 8: Slip2, sc2, hdc3, sc2, slip2Rounds 9 - 13: (5 rounds) Sc in each stRound 14: Slip3, sc2, hdc3, sc2, slip1Rounds 15 - 21: (7 rounds) Sc in each stRound 22: Hdc2, make 2sc in the next st, sc, sc2tog, sc2, make 2sc in teh following st, sc, hdc (12sts)Round 23: Hdc2, sc3, slip3, sc3, hdcRounds 24 - 25: (2 rounds) Sc, slip4, sc2, hdc4, scRound 26: sc4, sc2tog, sc4, sc2tog (10sc)Rounds 27 - 30: (4 rounds) Sc in each st Row 31: Sc. Ch1, turnRow 32: Hdc, bfsc2, slip3, bfsc2, hdc. ch1, turnRow 33: Hdc, sc2, slip3, sc2, hdc. ch1, turnRow 34: Hdc, bfsc2, slip3, bfsc2, hdc. ch1, turnRow 35: Sc in each stRound 36: Sc in the first st of last round, then sc in the next 8sts to form a round (9sc)Round 37: Sc in each stRound 38: Sc4, sc2tog, sc3 (8sc)Round 39: Hdc2, sc2, slip2, sc2Rounds 40 - 42: (3 rounds) Sc in each stRound 43: Sc, sc2tog, sc5 (7sc)Rounds 44 - 50: (7 rounds) Sc in each stRound 51: Sc, hdc2, sc2, slip3Round 52: Sc2, make 2sc in the next st, sc5 (8sc)Rounds 53 - 55: (3 rounds) Sc in each stRound 56: Sc7, sc2togRound 57: (This is slightly over 1 round) Sc3, sc2tog, sc2, sc2tog (6sc)Round 58: Sc4, sc2tog (5sc)Fasten offRejoin yarn to round 30 to the stitch you havent crocheted into yet.Round 31: Sc in this st, then sc10 around the inside of the hole made by the subsequent rows (11sc)Round 32: Sc in each stRound 33: Sc5, sc2tog, sc4 (10sc)Round 34: Sc in each stRound 35: Sc4, sc2tog, sc4 (9sc)Round 36: Sc4, sc2tog, sc3 (8sc)Round 37: Sc2tog, sc6 (7sc)Round 38: Sc, sc2tog, sc, sc2tog, sc (5sc)Fasten off
For the 3rd/ 4th ventricle: ch5Round 1: sc in the 2nd chain st from hook and the next 2 chain sts. Make 3sc in the first chain st you made, then sc in the back of the previous 2 sts you crocheted into. Make 2sc in the back of the first chain st you crocheted into (10sc)Round 2: Sc4, make 3sc in the next st, sc4, make 3sc in the last st (14sc)Round 3: Sc3, skip5, sc6 (9sc)Round 4: Sc, sc3tog, sc5 (7sc)Round 5: Sc in each stFasten off neatlyRejoin yarn to round 2 to the next st after the one you last crocheted in
Round 3: Sc in this st and the next 4stsRound 4: (Note that this is slightly more than 1 round) sc2, make 2sc in the next st, sc, sc2tog (5sc)Round 5: Sc4, make 2sc in the last st (6sc)Round 6: Sc, make 2sc in the next st, sc2, ch3. Sc in the 2nd st after the new you created when fastening off previously. Sc in the next 4sts of this section, ch3, skip 1 st on the other section then sc in the next st
Round 7: Sc in each stRound 8: Sc2, make 2sc in the next st, sc14 (15sc)Round 9: Sc in each stRound 10: Skip6, sc2, skip8, sc2Round 11: Sc in each stRound 12: make 2sc in the first st, sc, sc2tog (4sc)Round 13: Sc in each stRound 14; Sc, make 2sc in the next st, sc2tog (4sc)Round 15: Sc in each stRound 16: Sc2tog, sc, make 2sc in the last st (4sc)Round 17: Sc in each stRound 18: Sc2tog, make 2sc in the next st, sc (4sc)Round 19: Sc in each stRound 20: Sc2, make 2sc in the next st, sc (5sc)Round 21: Sc2, make 2sc in each of the next 3sts (8sc)Round 22: Sc in each stRound 23: Sc3, make 2sc in the next st, sc, 2sc, sc, make 2sc in the last st (10sc)Round 24: Sc in each stRound 25: Sc4, make 2sc in the next st, sc2, make 2sc in the next st, sc2, make 2sc in the last st (13sc)Round 26: Sc5, make 2sc in the next st, sc3, make 2sc in the next st, sc3, make 2sc in the last st (16sc)
Round 27: Sc6, make 2sc in the next st, sc3, make 2sc in the next st, sc4, make 2sc in the following st, sc (19sc)
Round 28: Sc6, make 2sc in the next st, sc4, make 2sc in the next st, sc5, make 2sc in the following st, sc2 (22sc)
Round 29: Sc5, make 2sc in the next st, sc4, sc6tog, sc4, make 2sc in the next st, sc2 (19sc)
Round 30: Sc6, make 2sc in the next st, sc4, sc2tog, sc4, make 2sc in the next st, sc2 (20sc)
Round 31: Sc8, ch3, sc in the 2nd st from hook and the next chain st, sc in the same st as you last crocheted into before you made the ch3, sc in the next 10sts, ch3, sc in the 2nd st from hook and the next chain st, sc in the same st as you last crocheted into before you made the ch3, sc in the next 4stsRound 32: Sc8, sc in the back loop of the first chain st, make 2sc in the back loop of the next stRound 33: Sc8, sc4tog, sc12, sc4tog, sc4 (26sc)Round 34: Sc7, sc3tog, sc10, sc3tog, sc3 (22sc)Round 35: Sc7, sc2tog, sc9, sc2tog, sc2 (20sc)Round 36: Sc7, sc3tog, sc6, sc3tog, sc (16sc)Round 37: Sc6, sc2tog, sc7, sc2tog, sc (14sc)Round 38: (Note that this is slightly more than 1 round) Sc5, sc3tog, sc4, sc3tog (10sc)Round 39: (Note that this is slightly more than 1 round) Sc3, sc3tog, sc3, sc2tog (7sc)Round 40: Sc, sc2tog, sc, sc2tog (5sc)Fasten offRejoin yarn to round 9. There should be 14 sts you hadn't yet crocheted into, 8 on one side of the central part and 6 on the other. Rejoin yarn to the 3rd of the 8sts.
Round 10: Sc in this st, skip2, sc in the next st, ch1Round 10: Sc in the first st of last round, hdcFasten offSew in all loose ends and sew closed any openings (like where you made the ch3 across the gap and the remaining sts you didn't crochet into on round 9)For the intraventical foramen (make 2):Ch3Row 1: sc in the 2nd chain st from hook and the next st. ch1, turn (2sc)Row 2: Sc in both stsFasten offSew one edge of each of these sections to the top of the 3rd/4th ventricles. Sew the opposite end to approximately row 11 on the left/right ventricle sections (see below)
For the corsum collosum:
With white yarn and a 2mm hook ch25Round 1: Hdc in the 2nd st from hook and the next chain st. In the next chain sts: make 2sc in the first st, sc3, make 2sc in the next st, sc13, make 2sc in the following st, make 2hdc in each of the next 2sts, make 2sc in the first chain st you made, ch1, in the back loops of the previous chain sts you crocheted into: sc2tog, sc5, sc2tog, sc12, hdc, make 2hdc in the first chain st you crocheted into (53sts)Rounds 2 - 5: (4 rounds) sc in each stRound 6: (Note that this is slightly over 1 round) Sc3tog, sc4, sc2tog, sc13, sc2tog, hdc2tog twice, sc, sc3tog, sc6, make 2sc in the next st, sc10, sc2tog, sc3togFasten offStuff and sew the cast-off edge closed
With white yarn and a 2mm hook ch25Round 1: Hdc in the 2nd st from hook and the next chain st. In the next chain sts: make 2sc in the first st, sc3, make 2sc in the next st, sc13, make 2sc in the following st, make 2hdc in each of the next 2sts, make 2sc in the first chain st you made, ch1, in the back loops of the previous chain sts you crocheted into: sc2tog, sc5, sc2tog, sc12, hdc, make 2hdc in the first chain st you crocheted into (53sts)Rounds 2 - 5: (4 rounds) sc in each stRound 6: (Note that this is slightly over 1 round) Sc3tog, sc4, sc2tog, sc13, sc2tog, hdc2tog twice, sc, sc3tog, sc6, make 2sc in the next st, sc10, sc2tog, sc3togFasten offStuff and sew the cast-off edge closed
As alwas you are very welcome to sell finished products but I do ask that you don't re-post this pattern or claim it as your own. Thank you!
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| The ventricles when combined with the thalamus |
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